i just never heard anyone complain about it before. read thru the 1 ed players hb and it specifically states that wizards start out weak but become the most powerful character class in the game at high level. nothing changed in that regard. why complain about it? they can still get killed fast with their low hp's if they don't play their character smartly.
Well, there are some people who believe the "start strong/finish weak" (found in demihuman level limits) and "start weak/finish strong" (found in magic users and clerics) are poor ways to balance things. But I don't want to rehash that argument.
As for wizards being "squishy", I'll take it you never faced a wizard with stoneskin (pre 3e version), flight, improved invisibility, dimension door, and spells that can kill the fighter long before he can get in melee range.
same thing with people complaining about save or die spells. so what? that was always the case in all editions. life sucks. someone might be able to kill you in real life in one second and there isn't anything you can do about it. same should be true for people who put themselves in dangerous situations in D&D. especially for them.
I don't play "real life". I play heroic fantasy. Dieing because one single die roll came up snake-eyes is at best a waste of time (getting ressed, making a new PC) and at worst a terrible ending.
If I wanted reckless danger, I'd go play in traffic.
as for the 15 minute game day, if you have that going on in your game sessions, your dm sucks. he shouldn't let it be that way, especially if you layers don't want it that way. i have never experienced it. i have never had a dm who allowed it in any edition. he drains us down to the last blood vessel and memorized cantrip before we can rest. there are times where i am down to my last few spells and have to find some creative way to use them in order to affect the situation at hand. that's the fun part.
Good for you.
Now, for others, we find that 3e encourages going nova because (as you said yourself) monsters can kill you in a single die roll. If I'm facing a frost giant, I'm gunning everything I got at him because I (the "squishy" mage) is toast if that giant breaks my defenses and hits me.
You can't have both ways. If you want combat nasty and brutal, you need to expect I'm giving it my all and not saving that spell for "next time" because with powerful monsters, save or dies, and all the other riggers your advocating, there might not be a next time.
If you want to continue the classic 15-min workday, save-or-die, and "wizards aren't broken" arguments though, lets take it to another thread and not clutter this one.