This is not representative of my experience. AGPL is unconditionally banned at most companies where I know the answer to this question. They don't care if the license is OSI-approved, they care if it aligns with their business requirements and objectives. Most companies are not ideological about open source.
BSL is at least making an attempt to address the legitimate concerns of businesses -- both sides -- in a balanced and pragmatic way. I have no dog in this fight, being neither a BSL licensor nor licensee (nor AGPL for that matter), but having been party to the legal conversations at large companies I understand why BSL is generally considered to be more acceptable than AGPL. BSL may or may not be the right license for this software, I have no opinion, but businesses don't care about arguments from ideological purity. If BSL satisfies their requirements better than AGPL, and anecdotally all the evidence seems to support this notion, then they will go with BSL software.
To put it another way, if OSI is serious about being in the conversation about the future of software licensing, they must address the reasons so many companies refuse to adopt AGPL software.