https://support.google.com/google-workspace-individual/answe... (for individual) https://support.google.com/drive/answer/2736362?hl=en (for Drive) - I don't see it for Admin but it's probably the same.
Here's one for Google Workspace Admin: "The Annual Plan charges you for the exact number of licenses you signed up for through a yearly commitment." The "commitment" makes it sound non-refundable. https://support.google.com/a/answer/1230658?hl=en
> Vendor lock-in refers to a situation where the cost of switching to a different vendor is so high that the customer is essentially stuck with the original vendor. Because of financial pressures, an insufficient workforce, or the need to avoid interruptions to business operations, the customer is "locked in" to what may be an inferior product or service.
https://www.cloudflare.com/learning/cloud/what-is-vendor-loc...
A practical example of vendor lock-in is an elderly aunt with mine who has an email address from her ISP. She isn't "contractually obligated" to continue using that email, nor the ISP. The ISP certainly doesn't have a monopoly on email. But the effort to switch from an email that she's been using for 15 years is very high for someone with weak tech skills. I'm probably in a similar situation with Gmail, as it's the primary contact by which most people know me. I can't take my Gmail address and port it; I have to create a new email and get people to update their address books.
But I don't really feel "locked in" to the apartment. Maybe it needs a better, more accurate phrase. "Switching friction"? That more accurately describes the situation than "lock in".
There is significant lock-in with email because:
1 - Email migration sucks and if you're a big org, this process can/will be complicated, expensive and carry potential down time for end-users.
2 - The bigger you are, the less willing you are to go through with #1 without a really, really ridiculously good reason
Migration is so painful some companies are still emailing from unpatched Exchange 2007 servers under the IT guy's desk.