I'm hunting for a job right now and this stings. I've had multiple companies just stop responding after 2 or 3 interviews. The weirdest one though was the company that after four interviews emailed me to "schedule next steps". The next steps turned out to be telling me they wouldn't be hiring me but to apply again in six months.
I have no problem being rejected but make sure you are actually doing so, a form email is fine. Ghosting me is not, and I don't need a phone call telling me you're not hiring me.