That is absolutely not an MCU class footprint. Anything with an "M" when talking about memory isn't really an MCU. For evidence I cite the ST page on all their micros: https://www.st.com/en/microcontrollers-microprocessors/stm32...
Only the very very high performance ones are >1MB of RAM.
A couple of years ago it was measured in bytes. Before the RP2040 is was measured in dozens of KiB now it's measured in MiB
While I agree that 16 MiB is on the larger side for now, it will only be a couple of years for mainstream MCUs having that amount on board
It really isn't. The RP2040 has 256KB RAM. Far away from 16MB.
>now it's measured in MiB
Where? Very few so far and mostly for image processing applications, and cap out at less than 8MB. And those are already bordering on SoCs instand of MCUs.
For applications where 8MB or more is needed, designers already use SoCs with external RAM chips.
>it will only be a couple of years for mainstream MCUs having that amount on board
Doubt very much. Clip it and let's see in 2 years who's right.