It's what the architecture is named. 32-bit mode code for intel processors is still called i386, even if that processor is decades old.

The most significant (non-SIMD) change was adding in CMOV.

This article is referring to Intels 32-bit instruction set, which seemingly all x86 machines still support.

All 32bit/64bit x86 machines.

I believe you can still buy new 8086 class and 286 class 16bit x86 cores in random SoCs.

And I know you can buy SoCs with 386 class x86 cores. It might be more accurate to describe them as 486 class cores that don't implement the full 486 instruction set.