We own an 800W microwave oven that was bought in 1999. It still works fine but I am thinking about replacing it, specifically since I hope to benefit from technology improvements that may have happened since then. But I'm not quite sure if there are in fact any improvements relevant to our use cases.

We use the microwave almost exclusively for thawing and reheating but I am not satisfied with some aspects:

* Thawing food is really slow: e.g it takes almost 20 minutes to thaw and subsequently reheat 600g of Bolognese sauce.
* It is necessary to supervise the thawing process and change the setting from thawing to "normal" cooking after the food has thawed sufficiently.
* The containers I use are specified for microwave use, but after 15 to 20 cycles they begin to discolor and deform. Maybe today's ovens are more gentle with polymers?

So would it make sense to buy a new microwave oven for us, i.e. would there be any improvement regarding these aspects?