I made the switch from kegmenters to conical fermenters in early 2020. I went from having to carbonate in serving keg, and then package what wasn't going to stay in serving kegs from that, to packaging directly from conical. I chill the wort as it goes into conical (plate chiller with O2 setup on the wort out side), put the yeast in via a yeast brink (pushed in through the bottom/dump port) and then control temperatures either via the chill coil (these are Spike CF10 units) or a heating pad on the cone. Once fermentation is done, I hook up the carbonation stone to the racking arm and push CO2 into the beer that way. Few days later it's fully carbonated and ready for packaging/drinking. Since I use the chill coils, I bring the finished beer down to carbonating temperature while in conical. I fill a serving keg (2.5 or 3 gallons) and then can the rest. These fermenters are rated for 15psi, which is the minimum I'd recommend. I wouldn't even bother with a conical that wasn't rated to 15psi. IMO, the ones rated for 1 or 2psi are far less useful making you do more steps/transfers than you would need to otherwise.
While I got great beer with the kegmenters, I'm getting great beer that's also easier on ME. The conical fermenters are on locking caster wheels. Which means I can roll them into the garage from the basement room where they ferment (same level) when I need to clean/sanitize/fill. No lifting needed for my setup. I would recommend that any conical you get be setup with wheels to make moving them easier. Unless you get a small one that you can easily lift/carry/move as needed. Brewing alone (currently), with a bad back, means I need to be sure I'm NOT trying to lift 100# (or more) of filled fermenter.
I ferment under pressure with these, which has several benefits. Not the least of which is not needing to use a blowoff hose setup or airlock. I can control the pressure level I want with the spunding valve easily (monitoring with the Spike gas manifold installed on the fermenters). I can also add hop pellets for recipes I want to dry hop once fermentation is done with a O2 purged setup. Reduced oxidization risk is no trivial matter either.
I can also easily harvest the yeast once they finish fermenting the batch as I want (bottom dump port into a different brink setup).
Using the racking arm, I can also be sure I'm extracting clear beer, without needing to use a siphon. Not needing to lift fermenters for gravity feed is no small thing either. Even though I did a CO2 push to transfer out of my kegmenters, I had to guestimate the extraction dip tube length for the fermenter size. I had that dialed in fairly well, but it's easier with a conical. Plus, conical fermenters (IME) are easier to clean once emptied. Well, they are IF you have the items that MAKE it easy.

I simply added a CIP ball item and use one of the pump mounted to the brew stand to move hot PBW around in the empty (rinsed) conical. Rinse again and then treat with sanitizer until I'm happy. I was using a sump pump for that, but using HOT PBW doesn't do those pumps much good (unless you get one rated for the higher temperatures). Also, since I already have the pumps on the stand, it's easy to use those.
Conical fermenters are not needed to get great beer. IME, it will make it easier on the brewer to get great beer regularly. I've also found they are easier to clean once things are done and I don't need to worry about infections (never had one). I've been fermenting in stainless vessels since sometime in 2011. Long before kegmenters were a thing, I was using commercial beer kegs I converted over to fermenters.