Agreed except when it comes to rolling for stats.
Always hated it for PnP, it creates a power imbalance between players that sticks for the rest of the game, purely based on luck. Multiclassing conditions in 5e are very easy to satisfy, so I do not understand the issue you take with that.
I suppose an argument could be made for singleplayer, because you're the only one affected, but as someone else pointed out, might as well choose your stats then (or fix them up with the inevitable save editors).
