Chromebooks have an expiration date, which means they will no longer auto-update, and (probably) eventually can't be manually updated, either. It will still work past that date, but without the updates there may be security issues with various apps.
Upgrading apps may lead to incompatibility issues. Since we do banking, investing, pay bills, etc. online the security and incompatibility issues are a big deal.
You can read about it here:
[
www.cnet.com]
This is a new concept, and I think its only been a couple of years since older chromebooks began expiring. So be sure to check the expiration date before buying a new chromebook, or before buying a used one. I think they are made to last about 5 to 8 years, but it varies from model to model.