It's probably been the same since WWI. After 40 years, the temperature controller stopped working. The replacement was exactly the same, and they'll probably be selling the same model 40 years from now.

I could rig for vacuum, but I'd need a new vacuum pump, the one in the crawl space doesn't start any more, but I've never felt a pressing need for vacuum. I don't store large amounts of anything, and cooked stuff bagged with most of the air squeezed out is good for a couple weeks in the fridge. That's all I need.

Bag Sealer