The Browns, not the Rams were in the AAFC. The Cleveland Rams won the NFL championship in 1945 before heading west, NOT because the AAFC Browns were just getting started. The Rams were in the NFL in the ‘30s, before there was a AAFC. Long live Waterfield/Van Brocklin/Crazy Legs Hirsch!
But my point remains; abandoning LA three or four times can't do much to endure your fan base. Whereas being a Lions fan and Detroiter since 1957 I've been saying for over twenty years, when the Lions move to Anchorage Alaska they'll win their first Super Bowl. We'll be left behind to root for the Bears, Packers or Vikings. For crying out loud!!!