I always used old.reddit.com with RES on my desktop. I've started using old.lemmy.world now, and I love the familiarity, but I realize how much I miss RES. I wish there was something for the old.lemmy.world that offered the same enhancements.
As a former user of old.reddit.com and RES, I've found the Alexandrite front end (a.Lemmy.world) to be very comfortable. Its not feature-for-feature equivalent to RES, but a lot of the ergonomics are there.
Alexandrite is great. The only thing really keeping Alexandrite from a 10/10 for me is the inability to set the default comment sort to top, new, etc. It’s a minor gripe but having to change it myself every time is frustrating all the same.
I'm talking about default comment sort. You can only change the default sort for your post feed at the account level. Not comments. Apps like voyager and photon allow it, which is why I hope alexandrite will eventually too, but it's not a native setting in lemmy, regardless of what instance you use.