Our oven took a crap on us and I was debating on getting the oven by itself vs all new appliances. Is it better to get all new at once vs buy one at a time while they go out and try to match the colors? I have no issues buying them all at once, with that said i wasn't planning on spending over $5k on kitchen appliances.
I research any appliance or vehicle purchases on Consumer Reports. I might check what models are available from local Lowes, Home Depot or other vendor. Check reviews online, or go to a store to look at different display models.
Styles, colors, and smart features are not top priorities. If I need to replace an oven then I try to find the best value that fits functional parameters and will be durable or serviceable.
We hate our old fridge, but it works, and is serviceable if something goes wrong. A new R600 (butane) fridge or freezer isn't serviceable if the compressor dies, then service can be near replacement cost. It's not worth replacing that working appliance just because we don't like the layout or the style of doors, or color.
Last three appliances I bought, clothes dryer, a cheap overflow freezer, and dishwasher were because an appliance died. When the water dispenser in the fridge died, I replaced the solenoid unit for $50. I don't really care if the trim on the dishwasher, fridge, and oven match. I don't care that the washer doesn't match the newer dryer.
Get the best value oven for your needs. Don't fix what is not broke.