> But the real problem I have with, "I hope the lesson will be learned" is that the lesson people are learning is "don't try to build ambitious software requiring a lot of work from a dedicated core team using an open source license; you're going to find yourself damned if you do and damned if you don't".

Yeah, for things running server-side that could be used by Amazon and Microsoft, they should use SSPL from the start. In this case everything is clear and everybody knows what to expect. For regular users, there is absolutely zero difference between SSPL and OSI-certified licenses.