Generally speaking, you can't just go out and buy a lifted and properly equipped truck when you want one -- yes, sometimes you can find what you want, but usually not.
So, if you lift and equip a truck, it then becomes more cost effective to just keep it up and swap in whatever needs replacement. If you get another truck, you have to start all over again and it's a lot of money.
I agree that if you like your truck, then modify it -- but only if you intend to keep it and keep it up and/or keep changing it into the truck you really want.
Otherwise, you're better off running it totally as is until you can get the truck you really want. Sadly, many of our mods add no value to the average buyer or trade-in value. So your money goes bye-bye when you sell it!