It’s Still Being Updated and Supported
Just because Apple isn’t making the HomePod anymore doesn’t mean that it’s not going to be supported. In fact, Apple has promised to continue offering software updates, service, and support for the product’s normal lifespan.
This means that even if you buy a HomePod now (from whatever supplies remain at Apple stores and other retailers), you’ll still get the normal one-year warranty, and you can even still buy AppleCare+ along with it, extending your repair coverage for two years and providing two incidents of accidental damage every 12 months.
More importantly, however, it doesn’t look like Apple has any plans to stop updating the HomePod operating system either. The very fact that Home Theatre Audio was added last fall is probably the best example of that, but the recent 14.5 update that came out for the HomePod mini arrived for the original HomePod at the same time.
This means there’s no reason to believe that you’ll be left behind if you opt to pick up an original HomePod. Further, while it stands to reason that the updates may stop in a few years, much like they do for every Apple product, even then your HomePod will still continue to function just as well as it does today.