Is a TAE socket still needed nowadays?

A TAE socket is still needed nowadays as the termination of the "last mile," as long as this comes into the house via copper. In the case of a fiber optic installation, it is obsolete in this respect. Future fixed-line connections will no longer be realized bound to cables but rather to accounts, which in turn come into the house via the internet line: with internet telephony, a virtual channel occupies a session, whereas in the TDM telephone network, a physical line was still "occupied." That means a telephony service provider no longer needs a dedicated "line" but simply uses an existing assumed Network Access. This is, of course, also terminated in fiber optics but no longer via TAE.

And which average homeowner is supposed to understand what you are writing?

And which average homeowner is supposed to understand what you are writing?