i accelerate my amiga because it was my everyday computer, and it was really great, at this time perhaps 1998, it still a really fast OS and for me better than windows (speed). You can't really enjoy the workbench without an accelerator and don't think to install wb3.9 with a basic a1200, it won't work. You know by this time i had a lot of fun with the workbench.
It flies with 68040 or 68060, it was really impressive in the last part of the 90's and it still impressive even today when you think about the hardware which running it !!!! If you like to tweak your OS, the wb is really good to play with.