How often will we need to update or replace

How often will we need to update or replace

I see my second generation nest will no longer be supported. How often is this going to come up. If I buy a new one how many years will I get out of it? I know this is way different in technology but my last thermostat was installed in 1950 so I would hope to get more than ten years out of these. Sounds like it will still work but degrade over time without updates.