>>2532803 there are other mmos that don't lock characters to classes, and leveling other classes have carryover skills, but for something truly open ended like runescape your best bet is something like poe2
>>2533544 I've tried POE 1, but I wasn't sure if it was an MMORPG or not, so I've just didn't count it there. But I haven't really tried POE2, so it worths noting.
>>2533544 POE2 feels aimeless to me. I'm not advanced enough to make my own builds so I'm just mindlessly following a premade skill tree and have no idea what I'm even aiming for beyond allocating all of my skill points/support gems. D2 with the rune system feels much more focused to me. Collect specific runes and unique items to make a new build based around those uniques/runewords.