from what I understand, the xw software is pretty buggy and theyve had , what, a decade, to fix it?
To be honest, the bugs came with the XW Pro. Before that with the XW+ 5548 and 6848 we put tons out and they were pretty much rock solid! Most of those (probably hundreds) installs are still working today. Some of the XWs that I installed are probably going on 10 years old now. Even the Pro has most bugs sorted out now though!
For an off-grid setup, the XWs are very hard to beat! Split phase, solid surge, great continuous output, awesome gen start options with the AGS.... I could go on for a while! Shoot, I have seen a double stack 6848 setup humming along with 7-7.2kW load on each inverter and it held it and ran with it for probably a good half hour or longer and never shut down! Try that with a new AIO and I don't think it would go long until they would overload! I doubt even the 15K would overperform like that for that length of time!
But once you start getting grid-interactive the AIOs just pull everything together nicely, as far as setting up the system goes. But, to be honest, I think they can be just as buggy as an "old clunky" XW sometimes! It takes some pretty serious programming to be able to make everything work together smoothly all the time!
Probably a big reason that Schneider is not changing much (at least in terms of firmware) on the Pros, is because they have an AIO inverter now as well. (Well, I guess their site still says coming soon.) Now, that would be a proprietary, high voltage battery, type of unit though.... I'm not interested in something like that to be honest! It does have 4x mppts, but only at ~16A, if I recall correctly. And if you were to ask about surge capability, they would probably say "surge.... what's that?"
Also, there is no screen whatsoever, so you need to use the app to see what is happening. Definitely not off-grid friendly!
The Schneider specs do say surge: 15.4kW, but I would need to see it to believe it. And I'm also sure that single leg surge is limited to half of that. Pretty sure it's a HF inverter.