I didn’t have a major issue with it when it was for brief cameos or minor roles such as Rogue One (though I’d have been perfectly happy with them using actual actors to portray those roles instead of CGI recreations).
But when it comes to doing it for the main character of an entire film, no thanks. I’d rather have a new actor who looks enough like the established character and does a great job playing that character than have some Orwellian digital facsimile anachronistically inserting a younger (or dead) actor into a modern film. And with Solo, that’s what we got so I guess I win!* 😛
*that last part about me winning was tongue in cheek if it wasn’t obvious