I have a somewhat unique perspective here — I owned a P6 (first a Hana EL then an Ania Pro then the Hana ML) for about seven or eight years before switching to the SL-1200GR2, so I've lived with both. But, the catch is I didn't do a clean swap. I changed my entire system simultaneously — out went a CJ tube preamp with built-in phono and CJ SS amp, in came a McIntosh integrated — so I can't give you a clean turntable-vs-turntable verdict. Take my sonic impressions with that caveat in mind. This isn't anything close to an A/B comparison holding everything else constant.
On sound: My partner and I both noticed the new setup sounds much worse. Whether that's the turntable, the cartridge (I went from the Hana ML to an Ortofon 2M Black LVB 250, so MC to MM), or the built in MM only stage in the McIntosh — I genuinely don't know. Certainly all three contribute differences. But it's bad enough sonically that I need to change. So, I've recently bought a Sutherland phono stage which hasn't yet arrived and am planning to put either a Hana ML or a ZYX back on the Technics (recommendations there?). My strong suspicion is the turntable itself is fine and the rest of the chain was doing a huge amount.
On your actual questions:
Set it and forget it: If you're using a Rega cartridge, the P6 is pretty much good to go out of the box and would win this. With other cartridges, the Technics probably wins. While I was getting good performance from the P6 and the Hana cartridges, I wondered about the VTA, which adjusting on the P6 would require using shims. I never bothered and the sound was excellent so didn't fuss with that.
Stability / skipping: Very real-world difference here. Heavy footsteps would make the Rega skip — a teenager bounding across the room was a hazard. The Technics doesn't care at all. I also have an album with a scratch I couldn't play on the Rega; the Technics tracks through it without issue. For your use case (listens often, doesn't want to tinker), this might be a meaningful "quality of life" difference. Maybe you can get more stability from the Rega with an isolation platter or wall mount, I didn't try.
Maintenance: The Rega is probably a bit more delicate. I replaced a belt, also had to adjust the lifter at one point. The Technics is new enough (just a couple months old) so lack of needed maintenance here is no surprise. But it feels less delicate to use.
Bottom line: My old system with the Rega P6 sounded much better than my new one with the Technics — but I'm convinced that's the phono stage and cartridge, not the turntable. I don't regret switching to the Technics; I regret changing everything else at the same time. Ask me again in a month when the Sutherland arrives and I have a better cartridge in place.