An update plan gives you access to all the updates in a 12 month period. It comes standard with any perpetual license purchased after October 29, 2018. Once the update plan expires you STILL HAVE ACCESS TO YOUR LICENSE and the version that your update plan expired on. You'll NEVER lose access to your license and we will never force you backwards.
Learn More:
Do I have to buy an update plan?
What if my update plan has expired?
HOW do I purchase an update plan?