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The ridges in that orientation are short grain and therefore fragile. The glue would help with that. However, it seems like a lot of unnecessary work when a spline would work as well or better and is much easier to machine. Grooves are easy to make on a table saw and setup takes seconds. Tuning a dado stack to the right thickness can take a few minutes but the TS will cut grooves in feet per minute where a router would be measured in inches per minute.
