D&D5 buffed casters on lowlevel like crazy, actually, compared to earlier versions.
More hitpoints, better defenses, more spells, stonger spells, can cast spells endlessly (Cantrips and ritual spells out of combat), ...
OTOH they are no longer as insanely strong on highlevel. Soloing a dragon like it was nothing on a Sorcerer in BG2 was so fun.
Oh! That's good to know. My tabletop knowledge pretty much ends with 3.5-4, and most of anything more recent than that from Dungeons & Dragons Online, so some of the stuff hasn't quite made sense to me in a D&D context. I have enjoyed exploiting a wizard's ability to cast a flurry of spells and cantrips outside of combat. Maybe it's time to buckle down and get some 5th Edition manuals, whether I ever end up using them in RL or not.
