Bruh. Idk. Any amount of engineering designs? Financial services? Using Macro in Excel? Programming arduino or raspberry pi? Researching quantum computing?
Why would anyone ever be doing this on an iPad? It is Win PC territory and to some extent Mac (if you really want to make life difficult for yourself).
Engineering: Buy a win PC. Mac OS apps are so far behind that it is joke. However, there are some very nice apps like Shapr3D for iPad. More competent than you think but forget the Inventor/Solid Works paradigm when using Shapr3D.
Macro in excel: poor app and not OS/HW related. Too many are confused about the difference between apps and the OS. I am surprised you seem to be one of them. MS is lazy to bring apps to iPad, I agree, but I think MS rather wants people to use the cloud.
Research in QC> you better have access to a supercomputer and be OS agnostic.
Programming controller: my experience was the it was easier for students with windows than Mac for these kind of programming likely because of a better Win environment.
Financial services: Not sure what you mean but it smells corporate and that means Win PC is better choice.
The idea of one device only, a "personal computer", for work is long gone. Professionals are not stupid, they chose the tools that works best to get the job done and are less occupied what kind of device it is or the OS. Some need a a traditional PC (and/or a Mac), some need both a PC/Mac and iPad and some only iPad to do their work.
Seems that you think lots of occupations are not "real work".
As I said before and many with me: apps are the iPads largest issue and we are all OK with adding capabilities as long as iPadOS is still touch first and "easy" to use.