100 mbps? That's 100 millibits per second, or 0.1 bits per second. I'd certainly hope for better bandwidth than one bit every ten seconds; that's slower than smoke signals.
Anyway, computer scientists split the bit back in 1969, which is how we're able to make smaller and smaller computers: the bits are all smaller, so we can pack more into a single potato chip.
The title used the wrong abbreviation and you didn’t read the linked press release. The previous standard was 25/3 Mbps so there’s no reason to downgrade; had you bothered to read the link you’re supposedly commenting on you’d see the new standard is 100/20 Mbps. That’s also laughably low for a regular household with a modicum of modern usage but we can’t really expect much from agencies under regulatory capture.