Porn was all on VHS. Seriously though it's not the entire reason Beta lost that battle but it was a contributing factor.
Betamax was Sony. They wouldn't license/sell the rights initially so the other manufacturers worked around the patents and came up with the VHS format which was technologically inferior then dumped them cheap on the market (and where the porn came in ). All the TV stations etc. were using Betamax and continued to do so since it was technologically better. By the time Sony decided they were getting their butts handed to them and started licensing it was too late. Market share was VHS and they couldn't catch up, particularly with Laserdisc and CD's coming on the scene. Mine was a HiFi and I used it instead of a reel-to-reel for music along with video. Watching it then going to friends and watching VHS was like watching a new hi def flatscreen TV vs an old analog color set. No comparison.
Back on topic, only real bad currents I've encountered was I believe on Cedral, wickedly fast horizontally and no way to get out. Was a pretty cool dive except I was trying to take pictures and stopping was not really in the cards. Had to get low behind things to really stop but that put me WAY behind the group. Catching up wasn't too bad though, with some kicking I looked like Spitz! (Way before Phelps...)