Let's see: Distributor failed around 50,000 miles (composite garbage), water pump failed around 50,000 miles, alternator failed around 40,000 miles, radiator failed around 50,000 miles, AC compressor leaked badly around 40,000 miles and had to be replaced, interior plastics are utter and complete disintegrating trash, transmission had to be rebuilt at 34,000 miles (luckily still under warranty) - then had to be rebuilt again around 70,000, had to replace intake manifold gaskets somewhere between 40,000 & 50,000 miles (gaskets were made of plastic - great material choice there - new gaskets are made of aluminum), & engine mounts had to be replaced around 50,000 miles. Not one of those failures can be attributed to lack of maintenance.
The biggest problem is that these vehicles required WAY too much maintenance. Nothing on them was engineered to last. Let the Astro name die forever.
Look we respct your opion and its not worth arguing about but suffice it to say our fleet dept never replaced the engine mounts, radiator, transmissions, intake gaskets, etc........ever in the vehicles lifetime. I know this because Im the fleet guy.
Alternator, water pump and the rest of what you speak of are wear items but they were not replaced in the intervals your speaking of other than the ac compressor which did fail at about 67000 on a couple. My 2002 never had a trans or radiator or engine mount or intake fail.
Now one of GM real POS is the Buick based 90 degree 3.8 V6 and front drive transnissions in cars like the grand prix, etc but not in the astro/safari siblings. Those used the 4.3/700r4 combo.
Im not talking about the GNX 3.8 as that was a killer engine. Im talking about the "dumbed" down versions in all the corporate clone cars.
Im also talking about the POS 2.8, 3.1, 3.4, etc 60 degree v6 POS.
My folks has a 84 S10 with the 2.8 V6/aut trans=POS. They aslo has a 99 Corsica with the 3.1 and 440T4 trans=POS. They also had a 99 grand pris with the Buick 3.8/auto trans=POS. all of these cars experienced exactly what you mentioned above in about the same time lines and mileage.