For my personal use I feel the opposite. (Although I’m definitely not the demographic you should target)
I prefer simple and sometimes less intuitive UIs since they usually indicate the product is either function-oriented or from a small team. When things are too polished it feels off putting and sterile. I’d use Windows Vista over MacOS any day.
But to answer your question, no I don’t think MVPs are dead. Instead of doing 100% of your product’s features at 50% quality, you should focus on doing 50% of your final product at 100% quality.
The idea is still to make something that’s just good enough to bear its own weight and demonstrate the concept to potential investors. The only thing that’s changed is what people are expecting
I don’t have a personal Microsoft subscription so I use google slides haha.
If you need a fancy setup to get a complex idea across then use what you need. Otherwise why not use the industry standard?