MPTCP has been on my radar for a long while and seems very cool.
I will say that for seamless wireless/wired switching, Linux bonding works very well. ~15+ years ago I had my laptop set up with eth and wifi bonded, with eth as the preferred, I believe using link-beat as the method. I could be running a big copy, plug in the ethernet and the transfer rate would almost instantly shoot up, and then when done I could unplug and all of my connections would stay up.
As WiFi got faster and faster, I used this less and less, so I haven't had it set up for for quite a few years now. But it does show the promise of MPTCP.
I will say that for seamless wireless/wired switching, Linux bonding works very well. ~15+ years ago I had my laptop set up with eth and wifi bonded, with eth as the preferred, I believe using link-beat as the method. I could be running a big copy, plug in the ethernet and the transfer rate would almost instantly shoot up, and then when done I could unplug and all of my connections would stay up.
As WiFi got faster and faster, I used this less and less, so I haven't had it set up for for quite a few years now. But it does show the promise of MPTCP.