If you think of a 5 fps drive as permitting shots that are just 1/5 of a second apart they make more sense, because they enable short 2-4 exposure bursts that show quick transitions.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
I don't find the 10fps drive on my elderly EOS1N particularly useful for photography involving considered, deliberate and slow (tripod-mounted) shooting; at 10fps, 36 exposures is gone in a couple more blinks shy of 3 seconds; I can imagine this churning would be useful in fields of science, research, astrophotography and some sports. If there is one benefit to the 1N with the power drive (offsetting the weight penalty), it is an enhancement of ergonomics and handling efficiency. But above and beyond that, getting 8 years from 8 lithium AA batteries (a lot of that with Bulb exposures) is very considerably better than the atrocious short power offered by the bog-standard 2CR5. I suspect other people here would also say that a drive enhances functionality and handling, comfort etc., even if you don't have a need for the top speed that is so often a selling point for bolt-on drives.
Acouple years ago a friend got married, I wasn't the wedding photographer but I took along my 2 F3's, one with MD4 and one without. Being a bit of a nut my friend wanted to dance up the isle after the ceremony. I loaded the F3/MD4 with a 36 exp roll og Fugi 800 iso and put it on "c". They removed 2 pages of photos from the wedding phographer out of their wedding album and replaced them with 16 of the photos I took showing the wildest gyrations. So sometimes you need it, I could not have anticipated when the 6'5" Groom in a blue seersucker suit was going to throw a shoulder high karate kick toward the new FatherinLaw
Always valued compact size and leight to speed so my OM-1 cameras have been used with no MD or winder. A couple of times in a few years it would have been handy but not enough to warrent buying a winder.