From https://www.couchbase.com/blog/couchbase-adopts-bsl-license/ it says:

> BSL provides a Change Date usually between one to four years in which the BSL license converts to a Change License that is open source, which can be GNU General Public License (GPL), GNU Affero General Public License (AGPL), Apache, etc.

So to me the most important question is what is the change license and how long does it take? If it's 1 year then it goes MPS 2.0: okay that's fine. But if it's much longer and more restrictive than it's a real about face and means the opensource version is really not workable as it's too far behind the head.

--- EDIT:

> 4 years, MPL 2.0

https://www.hashicorp.com/license-faq#What's-the-difference-...

4 years is basically "of historical interest" only especially when security is involved.