Sorry. Hadn't occurred to me you may not be able to see it (usually it's me who can't see things others post! 😂 ).

In a nutshell it boils down to the release schedule for .NET/C# - which people are paying to use - is too quick with too short support periods. He compares to another language, which is free (from memory I think it was Rust? I'd have to watch it again to see) which has the same short support periods, but is FREE. i.e. what are we paying for if we're not getting support for any longer than something which has the same support period for free? He's saying since MS is charging people for this, the support periods need to be longer, specifically security patches. e.g. if someone releases an app near the end of a period, then has only say 6 months before they have to upgrade it already, just to keep getting security patches. People don't have the option to stay on their stable release for a decent amount of time, even though they're paying for it. He just wants them to slow down the speed and increase the periods (we all know MS is all about pushing out new features over fixing bugs).