I dunno if this has already been suggested, but..... I kinda like the app/vpn Speedify. Found it yesterday, used it for one day, and canceled my other VPN.

It is useful in some situations, especially for me, having a satellite link with good bandwidth and high priority data cap but sometimes needing a faster ping, which I can get from my phone, but don't want to use too much data from my phone. Would be nice if we had that functionality (combining two local internet sources into something better)

Also could help if your mobile link is more responsive than a coffeeshop link, but you'd like to not hit your 22GB priority data cap too soon. Or if you have deep pockets, turn on redundancy and you get an even faster and more reliable link.

Or, you have 3 LTE links and you want to turn that into one massive mobile link, haha.

Or you're at your university and you plug in the ethernet and connect to the wifi at the same time. Plug in an extra wifi dongle too. You're being greedy now!  (and spending a lot of ITNS)

It's called link aggregation / channel bonding with or without redundancy.  Put it on the roadmap?