"Looks like June 26 may be the final curtain call for Google Voice. Google today announced that it's finally pulling the plug on Google Chat upon which Google Voice relies on the Asterisk platform."
You're quoting the comment of a guy taking his sources out of context. The G suite article he uses as a source doesn't contain the word Asterisk nor Google Voice
Google Voice will live on in some form via Project Fi. They make efforts to hide it, but Fi is very Google Voice-y. It even conflicts with Google Voice associated with the same Google account.
"Looks like June 26 may be the final curtain call for Google Voice. Google today announced that it's finally pulling the plug on Google Chat upon which Google Voice relies on the Asterisk platform."