I don't really have a hard & fast rule about what makes a piece of electronica a "fossil". Generally, ten years is enough in the world of computers to make something pretty thoroughly obsolete.
At this point only the very oldest of Canon's EF-M crop sensor mirrorless cameras meets that definition, Canon having been slow off the blocks in the mirrorless fad. The original EOS M, with its 18MP sensor lifted from the Rebel T4i DSLR, didn't launch until the middle of 2012.
The M6 in the photo above launched in 2017 and its 24MP sensor and DIGIC 7 processor makes it one of the most modern cameras I have, but the latest news from Canon would seem to indicate that the days of the EF-M series are truly numbered, which would prematurely fossilize a five year old camera.
While the body of the M6 is marked Made in Japan, Canon is coy about marking cheaper lenses with where they're manufactured. Given that the now-shuttered Zhuhai plant made millions of lenses a year, and the fact that pretty much all EF-M lenses are cheaper lenses, this probably signals the looming end for the EF-M crop sensor cameras.
The final nail in the coffin will be the launch announcement of a crop-sensor body using Canon's newer RF lens mount from their full-frame mirrorless line.
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