There isn’t really that much of this. Let’s consider an oven:
Good temperature control: accurate, precise and reliable temperature sensors (e.g. thermocouples) have been around for a long time, as have switching devices that are plenty high speed to make an excellent oven. PID control would be easy with 1980 technology or current technology. Ovens with good temperature control are nonetheless rare.
Forced convection (aka a fan): no new technology required. And they’ve been around for years.
Direct outdoor exhaust: this was available in the 80s and 90s. Not sure where it went.
Good insulation: nothing fancy here. Mineral wool and fiberglass have been around for a long time. Even silicone rubber gaskets that tolerate oven temperature are not particularly new.
Touch screens: most of them are still worse than the old analogue controls.
Steam with good controls: this is pretty new and very rare.
I suspect most of what’s going on is that fancy appliance makers try to keep BOM cost very low and that helps and whistles sell appliances. (Compare a $1500 induction cooktop to a $7k fancy brand gas cooktop. I suspect the BOM cost on the induction unit is rather higher. The gas unit has some cheap brass or bronze castings (I think I read somewhere that those burners cost under $20), a potentially shiny piece of stainless steel sheet, and really cheap controls. The obvious safety mechanism to turn off the gas if the burner isn’t lit? Nonexistent. The only thing $7k buys you is a nice brand name and maybe slightly more solid construction than a much cheaper unit.)
