Free for personal use, so yes-ish. That’ll certainly be a deal-breaker for some.
Realistically, people who are using it for personal use would probably be upgrading to the next LTS shortly after it’s released (or in Ubuntu fashion, once the xxxx.yy.1 release is out). People who don’t qualify to be using it for free anyway are more likely to be the ones keeping the same version for >5 years.
Yes and no.
The original 2015 release (10240) has support from 2015 - 2025. The latest 2021 release (19044) 2021 - 2032.
The product as a whole has around 16.5 years of support from go to woah, but each individual release is supported for 10 - 11.
https://learn.microsoft.com/en-us/windows/iot/iot-enterprise/whats-new/release-history#windows-iot-enterprise-ltsc