Just a microwave saves significant money as I only need to order one restaurant meal a day and can easily split it in two. I need to be very picky about what I can eat so if I found something I'd much rather not waste half of it.

So many hotel rooms don't feature microwaves. Sure, full kitchens are a fire hazard but a microwave?? Maybe because some has room service and want to push that instead? Or maybe they had room service it ceased but the lack of microwaves stayed like bugs in legacy codebases.