I made sure to buy zigbee ones so that I'm just tied to home assistant which even if it goes out of business will still work with whatever binaries I've downloaded already (as well as it works locally so I can control them during internet outages). I'm sure somebody else can explain why you should get Thread or Matter nowendays but I never bothered to learn the differences.
But yeah, the average life of a company is what 1 year? Don't get any product you want for more than 5 years from a company younger than 5 years if you need that company to exist for it to work.