Earlier quoted context omitted.
American Airlines self-reported a baggage mishandling rate just short of 1% this year. That seems really high to be honest, when you consider that most planes have a minimum of 150 passengers. 2022 was an anomalous year since the airlines ramped up their schedules without having support staff at the airports to handle it. The statistics seem to indicate a tripling of lost luggage rates.
For international trips this is close to 10%. My math professor is flying once a month to Europe from the US for the past 20 years. He told me about this statistic he built from his trip history and I thought he was exaggerating. On my 10th trans-Atlantic trip of course I lost my luggage.
At Heathrow, it'd mean 20,000+ people a day with lost luggage (if they all checked luggage). You'd need more than the entire taxi fleet of London to get their luggage to their hotels.
Really doesn't pass a common-sense check.