I am a huge fan / proponent of employing a good mix of neutral stances and semi-open stances. Judicious or limited (moderate) use of extreme open or extreme closed stances for most rec players.
The issue that I have with employing primarily semi & fully open stances is that it can be particularly stressful to the loading hip. Modern players, who primarily use these stances, will sometimes a hip problem (and can easily afford to have it fixed).
However, most modern players who employ these stances, prolifically, put their time in with a lot of monster walks & other countermeasures to strengthen the area. Some rec players who emulate this type of footwork may also put the time in to bulletproof their hip. But
many rec players are
not willing to put in the time or are unaware that they should. These players should stay away from a prolific use of open stances. This is the very reason that I stress primarily neutral and semi-open stances to students.
No one in the past, not even Borg, Sampras, Davenport, Capriati, etc used the reverse finish to the (extreme) extant that Nadal & some other modern players do. While Federer and others often use a reverse finish, I do not believe that anyone uses it nearly as much as Nadal does in competition.
Rafa has a somewhat unique implementation of reverse finish -- a lasso or helicopter (around the head) variation. Most other players tend to finish with their hand staying on their Fh side or going directly over their head (like Sampras et al did) rather than around the head.
A huge problem with people that emulate the reverse of Rafa is that they tend to grossly overuse it. They tend to hit with a very
late contact point -- even when they don't need to. They get into a bad habit of preparing and hitting late rather than using the reverse more judiciously.
Note that Sampras primarily use the reverse finish when taken out wide on his Fh side. His goal with this was often they hit a sharp angle with a good amount of spin. Some pro players use the reverse primarily when they are late.
I do not recommend any rec players using the reverse in the manner or to the extent that Rafa does. Even Rafa uses it only in competition -- not in practice sessions. That's not what you see with rec players who try to emulate him.