alt Hacker NewsThis seems pretty uninformed on the embedded side - the speaker is I'm sure very qualified generally but it sounds like mostly on the server/desktop side of things.
Like on Armv7-M it's said "Nobody is building anything with this kind of hardware now" - this is just wrong to the point of ridiculousness. Thousands of new products will be designed using these microcontrollers and still billions of units will be produced with them in them - now, true that almost none of those will run Linux on those MCUs but it's crazy to say "nobody" is building things with them. Many of course are moving to Armv8-M microcontrollers but those are 32 bit too!
On the Linux side, there are things like the AMD/Xillinx Zynq-7000 series that will be supported for many years to come.
It's not the worst idea in the world to deprecate support for 32-bit x86 but it is not time to remove it for ARM for many years yet.
1. Until proven otherwise, let's assume that the speaker at the Linux conference was probably talking about Linux and saying something not ridiculous.
2. That sentence wasn't about 32-bit, it was about devices without MMUs.