Seems a number of production shops use these quite often. And tradesmen working in homes with major concerns for dust collection. I remember an old southern mansion, original map of the 1,600 acres and house mounted on the wall, I was doing some HVAC installs in and the house was under major renovation. Sweeping, wide double arched staircases going to the second floor. Main front entrance was 1/2 the size of my house, beautiful hand crafted moldings throughout the house. The house had a half basement, below the raised 1st floor and then a basement with two floors above the main level.
At the time I was there the kitchen was the main focus of renovations and they were replacing all the cabinets. It was the first time I had seen the Festool track saw and dust extractor and not one bit of sawdust was falling to the floor from the cuts. I was way impressed and the quality of cut was as good as any blade on a table saw could produce. That evening a sub came in to cut the plaster walls for new work to be installed. Everyone else was gone for the evening and when we returned the house from main floor to 3rd was coated with a very fine plaster dust. The fool hadn't closed off the kitchen and with windows open the dust traveled through the entire house.
He had used a skill saw to cut the plaster walls producing a ton of dust. A simple plastic sheeting and tape would have contained the dust but a track saw with the dust extractor would have almost eliminated the dust all together. So these tools do have their place for sure and evidently they do fairly well as they have plenty of dealers. While I have a few of their tools, they have all been refurbished and bought at a reduced price.
Let's compare them like cars. There's the Vega and Pinto, then there the Cadillac and Porsche. Tools are no different. Not saying either won't get you from point A to B but how you get there and the ride is far different.
Here's me justifying my Domino DF500 and Track saw. And I would mind getting one of the midi extractors for the dust extraction on both, but that will be refurbished as well. Now I did use one of their routers in a class and didn't like the feel of that at all. And let's not discuss how many tools have been bought that were pure garbage or broke in short order or just couldn't get the job done......I like to find an acceptable medium if possible.
Like telescopes, I own two high end , a research grade Ritchey-Chrétien and an Astro Physics Stowaway 92mm refractor, not to mention the Takahashi FSQ-106ED. I also have an Astro Physics AP1200GTO mount. All of these are tools and I use them to image the heavens with a CCD camera. The data can be used for scientific purposes or pretty pictures. I do both. I could do something of the same with lesser quality but I know, with proper care these will not only hold up to night after night reliable use, they will maintain a high value. For that matter the AP refractors will actually become more valuable due to the fact all are hand figured and not massed produced.
Unfortunately the Japanese Tak lenses have very soft coatings and they need to be sent back to Japan for recoating. That cost is almost as much as the cost of a new model after figuring in shipping both ways. So like woodworking tools, there are considerations like initial value, service, reliability, and ease of repair. And when it comes to the Domino, like any new tool which is first of its kind, until the license patents expired and it gets copied like the biscuit jointers, it will be expensive. I wonder why their track saw is compared to the rest or why some tracks are made to fit the Festool? They must be doing it right.
Seems I covered tools, cars, and telescopes. There is a market for most products, it just depends on the audience, budget they have, and their approach to the task. I usually try to buy what is proven to be of good quality, holds up under use, is well supported and serviceable, and I think will work best for me. I've bought lesser and regretted it soon after but there have been a few tools I paid less than main brand and felt they did OK.
But to address your question, evidently to enough they are. They been in business for a while.
The company manufactured the world's first portable chainsaw in 1927. The company's name was shortened to Festo in 1933. Festo founded Festo Tooltechnic in 1992, and the power tool division was spun off into an independent company, Festool, in 2000.
Just my thoughts.......