Patent: Canon presents some interesting fast zoom lens optical formulas | Canon Rumors

Then perhaps be specific….
I expect what you want to happen to occur by year 2024 when I expect the EF system to cease production.
My guess is your wanted outcome will come out by 2024 when the EF system ceases being produced.
Given that EF system will be phased out by mid 20s

I don’t have an issue with Canon choosing to cease production or reduce the number of EF lenses they actively sell but they will be available to buy for a long time to come. There just isn’t any clear reason to stop if Canon is still making money from them.
Their R&D costs have been amortised to zero (except maybe the EF400/600mm)
There shouldn’t be any manufacturing learning curve for their manufacturing cost
Parts costs should have been optimised by now but supply issues could impact this

Canon has and will surprise me and others with their decisions when it didn’t seem logical to us but they haven’t (to my knowledge) given any timeline indications for phasing out or stopping EF production.

Can you point to data for the countries that have stopped importing EF lenses? They may already have excess stock on hand to cover warranty and repairs but that would generally be at an individual lens level. EF-S lenses have reduced in range but are still essential whilst APS-C DLSRs are being sold and are the only option for UWA (adapted) focal range for the R7/10 today.