Depends. 2024 Monk runs circles around 2014 Monk. Warlock in 2024 is a deliberate attempt to murder everything good at 2014 Warlock, excrpt for being less Eldritch Blast drpendent
I didn't vote, but I prefer: having to memorize only one version of the ruleset at a time, as that is hard enough for me as it is. Since I'm currently playing 5.5e 2024, that would make it the preferred version for me right now.
5.5 is smoother to play with being more engaging, in terms of combat rules. Plus as a DM the commitment to include more adventures at different lengths into the core books is such a boon that it baffles me that more people aren't talking it up.