I build model cars. I like to use an automotive line of lacquer primers and paints, including a spray clear-coat that started disappearing several years ago, so I bought several cases where I could find them, mostly on Amazon.
The colors started disappearing too, but I have a nice collection of those I've collected over the last 20 years and they still spray, and for a last resort, I have Automotive urethane primers and paints that are far superior to anything in a hobby store.
When Tamiya and the other hobby brands are forced out, I will either still have my urethanes or be dead. I'm a dinosaur in the hobby and could kick the bucket anytime.
In the meantime I wear my 3M Respirator when spraying.