I had an Alienware 15 when I worked for a place that was developing machine learning models long ago. It worked for that and it plays games well too. My employer was able to get it through their contract with Dell too.
That was in early 2017, my 2013 mac mini gave up the ghost early this year and at about the same time the keyboard panel of the Alienware developed a bulge so it is no longer usable as a laptop but it is going strong being used like a desktop machine.
My take though is that all "desktop replacement" laptops have their batteries go bad and in a year or two they are good enough to run from one conference room to the next after that.
If you want an A.I. dev machine your best bet may be to build a desktop machine, I built one in January 2023 with a 16 core AMD processor case full of perforations, a glass side, RGB bling and an RTX 4080 because that's what I could get.
When I am on the go I log into it from a basic iPad with a cheap bluetooth keyboard and mouse, usually to use my RSS reader YOShInOn which is a web application but with RDP if I want to do something more.