mempool size over the past 30 days : https://blockchain.info/charts/mempool-size?timespan=30days https://blockchain.info/charts/mempool-size?timespan=30days I

mempool size over the past 30 days : https://blockchain.info/charts/mempool-size?timespan=30days https://blockchain.info/charts/mempool-size?timespan=30days Its almost never below 15MB - ie 15x as many transactions waiting to be processed, as can possibly fit in the next block. [ and blocks arrive on average every 10mins, so its a long wait to clear out the daily peak ] To me these stats really do present a "very good engineering reason" to increase blocksize.