OK, maybe I should wade in with a British por-user perspective (or I'm a bit sceptical about a few of the points raised here). I've been a track saw user for 17 or 18 years having started out with a Hilti WSC255 and progressed to a Festool TS55 and TS75. I've used the Makita and Mafell, too
Try trimming a 60 or 70mm thick solid oak door or a similar thickness fire door (not an uncommon task on refurbs in older office blocks, hospitals, public buildings, etc) where the floor level may have changed (tiles instead of vinyl, etc) and you'd soon "get" the TS75. For specific uses on site they can be very handy, but TBH mine stays in the van most of the time
I already said I work in a shop, not on site and that for site work it's different story. I also said the TS 75 is the only track saw worth getting when working with thick hard woods(for me any hardwoods at all), the others FOR ME, are plywood saws. To be clear, I use Festool rails as I am in the whole Festool system, even my Makita has Festool plug it ends.
So I think you and I are on the same page as far as the TS75.
Possibly if you didn't have a TS 75 you might have a Makita and not a TS 55. You have that choice to go to the TS 75 when you dont have the power right now, but for the guys that can only afford to have ONE saw my suggestion is still the Makita for the 55 size range. I believe the Makita is the choice right now, until Festool adds 15% to the power of the TS 55. And really I wouldn't mind the TS 75 going to 15 amps, there are still certain things my skill77 needed to be pulled out for, even before I sold my TS 75. I woulnt mind if Makita upgraded their track saw with some of the missing options the Festool track saws and others have, there is something about the Festool saws that so seem for lack of a better word more "elegant" than the Makita.
I use a track saw everyday and any track saw is better than no track saw at all. Many guys can use a TS 55 and be happy, I wasn't happy so I sold my TS 55 and my TS 75 and kept the Makita. Because I buy into the "plug it" ends and dust collection hoses that have the electric cords integral to them I gravitated to the Festool rails becasue I have an OF 2200 and some other Festool tools. Others may not buy into the Festool system and be fine with the Makita rails.