The shutdown announcement says the shutdown was caused by "challenges during the ongoing very cold crypto-winter". Wish we had more details about that. Did the ongoing winter reduce income to make the service unprofitable ?
These days there are lots of services offering p2p trading, and big exchanges like Binance also have p2p trading services for multiple cryptocurrencies. I would guess that Binance p2p volume alone is likely many times of that from LocalBitcoins these days. Most players don't publish their volumes though.