When I was building my -8 back about 7 years ago, there were a number of folks that recommended strakes to smooth the flow over the wing root and prevent "tail shake" in the stall. Then others reported that the tail shake was present only when they were flying without upper intersection fairings, and when they installed those, the shake went away. I think back then, it was more common for folks to "get flying" before they finished the gear fairings (probably because there were few - or no - sources for pre-made fairings, and builders hated making glass parts from scratch), so there was more discussion of the phenomenon.
I have seen little to no reference to the stall/tail shake in the -8 in more recent years, and I attribute it to the fact that most people are doing their intersection fairings before first flight. This has, in turn, led to less talk about the strakes, as they appear to be unnecessary.
This is all a good argument for not doing Phase 1 until you are in a "final" aerodynamic configuration - otherwise, you just need to re-do it....
Anyway, that's a little history as I remember it!