The main difference between Indy and Bond, for me, is that Bond exists in real time. When is 2023, the character exists in 2023. They can just keep going. But Indiana Jones is very much a character that works in the past.
If they do recast, what is it gonna be? New adventures set between 1930 and 1960. Just filling gaps in Indy's life. Which is something the Star Wars universe has been doing for years now, explaining every single thing, filling every single gap in a character's life. And, honestly, I don't like that. There's nothing wrong with having some closure with certain characters. I'm fine with having some mystery, unexplained things. If I want more Indy adventures, there are many books and novels already.