In AI Era, Is it still worthy to be specialized in only one field?For example Frontend only or Backend only?Or it is time to be a Full Stack Developer( T Shaped) including even Devops?

There will always be experts in certain fields, but the level of expertise needed to become one is becoming much deeper, for the most part in my opinion people will benefit more from being able to work across a wider scope, from product knowledge and understanding customer needs and requirements, all the way to building, deploying, and managing the product/service.