In Germany we have got an integrated system with small pockets of protected forest inside leger forests. However, in opposition to most of the world, we don’t do clear cuts or the like, except for big calamities. we would usually fell single trees inside a forest and have the others left over for a later date or generations. You can get a year old sapling next to a 300 year old oak and everything in between right next to each other. Naturally due to historical over use, we haven’t got any old growth forests like in Ukraine or Poland, but we certainly preserve our ecological functions.

Maybe where you live. To get a usable tree you need at least 40years around here, to get a tree you can build with takes around a hundred years….

While i agree with you, i have to note that trees generally reach the age of about 30-40 before harvesting, at least stuff like spruce which is what is mostly grown in sweden.

The whole defining feature of forestry is that you harvest stuff planted by your dad when he was a kid.