And this is how we end up with long lifetimes for software like Internet Explorer, which ends up holding back most people's experience with the web, especially mobile, because a lot of extra scripts/code has to be shipped to maintain compatibility (polyfills, newer features can't be used and thus must be compiled around, etc.), which directly impacts the value being able to be delivered to end users costing more or having less time being able to be allocated to doing so.
More people have to suffer usually if software ends up long lived without being pushed to upgrade when there are newer technologies that improve the experience - it's a heavy price of others you're asking for a lot of times when choices have to be made between compatibility and improvements that often get discounted unreasonably.