I can see that your microwave is important to you, but to me "I don't care" doesn't really capture how little I care about my microwave.
I think the one we have is probably the cheapest available when we bought it 8 years ago. The buying decision probably took less than 1 minute, without hyperbole. I only ever use one button, I just press start n times until the timer says something reasonable.
When buying this stuff I don't really see a risk of being locked into any bullshit because all microwaves can perform their basic function of heating food.