intel computers and apple silicon

How long will apple support and provide updates for it's intel based laptops? I know they are planning to switch to apple silicon starting later this year. I am planning on buying a new Macbook Pro but I want to ensure I will still be able to use it 5-6 years from now if I want to. How many years does apple plan to continue to provide updates for these computers? Will they still have trade in value? The "for years to come" statement apple has made is worrisome. 2 years? 5 years? 10 Years? If you have ant insight or specifics please let me know!