Alban1999 Yep, I know, I've experienced this myself. Different implementations with different behaviors and supportability, different vendors, different support centers, etc. etc. It's key to build up a phased plan where every step is as safe as possible; and of course to do research and test as much as possible. I know this sounds easy, but in practice it can be a different story.
1 example: MFPs. Different brands, different models, different SMB situations. And then things also depend on the firmware version of those devices. We had to inventorize our MFP environment, update the firmware everywhere (to make everything consistent and up to date anyway, something I was asking for since, well, a very long time, but not everyone understands why this should be done; till now ;-)) and check what the SMB situation is for every model. Sometimes we could use SMB 2/3, but we had 1 model (9 devices) where SMB 1 was the only option left. We plan to disable it anyway, so scan to folder won't be possible anymore soon (admitted, we have a lot of MFPs around, so it's not that bad for us, but I can imagine this isn't always the case elsewhere).
Just bear it and try to ease the pain... 😞