I think this is pretty smart, the original probably isn't getting more popular, just the same people who've stayed caught up over the years, I've tried starting it, but that many episodes is quite daunting. Personally I'm much more likely to watch this as it comes out.
Took me 3-4 years to even catch up (no one pace or any other method).
It was cumbersome at times but I was invested for old times sake.
If some 3rd party does a summary of every arc in ~1h per arc It would be like a very fast movie. But you'd miss even more subtle developments than with anime vs manga.
I watched the Netflix show, it was fun, so I thought I might check out the animated series. And dropped that idea quickly again.
If I want to reach the newest episode I'd have to watch three hours a day (no exceptions, not even for Christmas or birthday) for 5 (FIVE) months straight. If I was twelve I might try that, but as an adult I don't want to commit myself to so much time.
One Pace has almost all the arcs edited down to remove filler and keep the pacing consistent with the manga. It's about 45% faster than watching the original anime.
It's still a marathon, but a significantly less annoying one that doesn't have large sticky mud sections randomly throughout (the metaphor breaks down a bit here...)
I used One Pace to catch up recently and it's very good - downside is a lot of the earlier arcs aren't complete yet, but the OG anime isn't quite as bad with those so it's typically ok to just watch the real one for those arcs.
It's worth it though. I've been watching for about a year and just hit 600. The show's writing alone is worth watching for, it's some of the best that anime has to offer. There's also not a lot of filler, roughly 10% of the show is filler and it's not all in a row; it's also stuff you can easily skip since most of the streaming apps organize the show by arc anyway.
As someone who used to talk shit about this show for over ten years, it's 100% worth watching.