Airbnb says it's going to focus on longer-term stays, but analysts worry its short-term rental roots will make it hard to grab a piece of the $18 billion market

· Airbnb, which dominates the market for short-term rentals, plans to focus in the future on longer-term stays.
· Even before the coronavirus crisis, the company was seeing growing interest in extended-stay accommodations; during the pandemic, such reservations now account for nearly half of Airbnb's business, CEO Brian Chesky...