Looking at the new machines similar in size to what I have I see the new stuff is pretty light weight in comparison. My old
Monarch weighs at least 6000 pounds and a new lathe in 1640 category is about a third of that. I would gain the ability
to machine a more accurate cylindrical surface possibly and do metric threading but would lose rigidity for sure. Even a worn
machine can do good work if one knows it's limitations. The Monarch has served me well and has seen a lot of improvements
so it gets to sit where it is for years to come. If someone stole my Monarch(not likely) I would find another one to replace it.