When can I JUST use TM internet modem as ONLY a modem, in BRIDGE mode, with NO NAT, NO firewall, and frankly NO Wifi.

I just ordered the 5G home Internet hoping I too would be able to dump Spectrum. From the great information above, particularly regarding carrier grade NAT, I see I would have to totally revamp how I think about "internet facing" when it comes to my Pfsense WAN interface. I've depended on having a public IP on that box for IPSec purposes as well as some port forwarding. This will be a long and tricky road to finding ways that I can satisfy all my needs around this new architecture. This is especially the case since we (the customer) have no power in the upper layers. I hate working on my home internet because of this. Once you've been spoiled in the professional networking world where you can control everything from the public facing BGP routes of a company to a local workstation's RFC1918 address, it sucks to get stuck back into the "consumer" box. It sure would be nice to have that kind of power with my own home internet! I guess we're just going to have to collect our knowledge and work together to find new ways of accomplishing our goals within the bounds of new carrier tech which we cannot control. 😔