CGI definitely doesn’t hold up, that troll in Mines of Moria, various Legolas shots, etc. are pretty rough. But everything else is still great.
On a side note I’ll always hate the people that decided to add all that CGI to 2011 The Thing when they had already filmed everything with practical effects. If I ever meet them IRL I will give them the most well deserved ass punch.
Side side note, still waiting for the practical effects version of 2011 The Thing to be released.