If the SSPL is more aggressive than the AGPL why don't companies just adopt the AGPL. This is an honest question. I'm familiar with the AGPL but not with the SSPL and wondered before, why the AGPL is used so rarely.
While an open source maximalist might be happy with that ambiguity, if it impedes the use of the software and hence the chance that a broader community of open source will thrive, it arguably backfires... SSPL aims to make explicitly clear that it is in context of building a public service for the software that the copy left provisions of an expectation of open sourcing occur.
The theory is that this allows the software to be more widely used and for the community to benefit when a public service open source project is maintained