West Brom were unquestionably a yo-yo club that stabilised
Think possibly Stoke a while back?
You could add Newcastle to the list also
West Brom was 10 years ago and I wouldn't call Newcastle yo-yo, they were a well established Prem club before their relegation (outside only 2 years in 25+)
I think the term is used far too much and imo if we come back down we'll be squarely in the mix with at least 10 others to go back up with no better chances than the rest of them