Should I upgrade my iPhone 11 Pro Max(64GB)from iOS 14.7 to iOS 26?

It’s not my main phone,I got an iPhone 17 Pro Max(512GB,iOS 26.3.1)and an iPhone 11(128GB,iOS 16.5),which I’m still using just because it’s comfortable and small

I just want to ask if it will lag on iOS 26.3.1,since it has only 4GB of Ram

The reason that I want to upgrade it is that it cannot use almost any new application,like the new version of YouTube,ins,X and lot of Ai applications