I have built lots of both transmissions. You can bolt in every upgraded fancy part into a 4L60/65/70E transmission, it’s will still be weaker than a stock 4L80. In my opinion, other than premium friction material, a drive shell, and shift kit, if you need more than that for a 4L60 to be expected to live, then you need a 4L80. By the time you spend the money for all the fancy stuff, you could have bought the parts to install the 4L80, and not worry about breaking it.
The trouble with the 4L60, about the time you add enough friction and pressure for the clutches to not slip under load, you have exceeded the load capacity of the hard parts (shafts, gearsets, sprags, etc). The 4L60 was originally designed back in 1982 for use behind wheezing 305 and v6 engines. GM has continued to update and improve the trans, but it definitely has its limits.