TLDR: Solidworks intends to charge "reinstallation fees" for users that let Solidworks Subscription lapse... ie if you don't keep your subscription you will pay the full fees later when you renew. Here is the email from SW:

System Requirements for your SOLIDWORKS [without subscription]: Possibility when operating system is updated, past Solidworks version may not work properly.

Reinstallation Fees. Effective July 1st, 2023, any subscription renewal being submitted to Solidworks after subscription end date: § Solidworks requires full subscription costs from the time license expired until the current month, and:

For CAD Licenses – mandatory 2-year forward subscription with cloud services. For Non-CAD licenses – mandatory 2-year forward subscription.