99% of online discussions describe IBM as  Buffett’s misstep, but https://finance.yahoo.com/news/warren-buffett-ibm-very-profitable-171245620.html estimates that “As I noted in a previous article, this investment wasn’t a complete disaster. I put the estimated holding period return at 5% overall, including dividends.”

If you don’t read the fine prints, you would walk away with the wrong impression… Common System 1 weakness in news-based learning.

I think Buffett has in his career made many questionable buys, where he has to hold decades to breakeven, provided the asset is fundamentally productive asset, without erosive annual fees. I feel he can hold forever until breakeven of the asset becomes worthless like bankrupt. If he can, then I think he would.