I recently used United-Wi-Fi between MCO-EWR and it worked well enough for me which is a first and it was fast, fast enough to stream YouTube TV over my VPN without any issue.
I know that on DELTA birds with GoGo 2Ku streaming is allowed and encouraged. On those 2Ku flights it seems that GoGo is actually less expensive and way faster than the older GoGo ATG-4 or whatever the EV-DO GoGo is called.