Quite the same, but thank you about the timeframe of firmwares.
My last broadband ISP contract was symmetric for 100mbps and traffic shapping was set to simple and 100mbps.
Speedtest.com tests could easily reach 100mbps.
My newest contract is 240/40, so asymmetric band, and then I went there and set accordingly. Speedtest.com tests, lots of them on lots of different servers and also using MacOS app, never gets higher then 60mbps.
Called meraki support and got only that it should never go that speed... just 50mbps as stated on PDF.
So... it's too confusing and I'm pretty sure the latest firmwares are doomed.