In https://twitter.com/kuenzler/status/1397814747379154944 (German), Fredy Künzler from init7 talks about PON and why init7 is opposed to it.
He makes the calculation that from the ≈3000 CHF needed to connect a location with fiber, only 50 CHF difference come down to PON or AON. The advantage of dedicated lines (for all ISPs, too!) overweighs the financial savings in his reasoning.