Oh I think Mr Putin has some very good reasons to stop his aggressive war. I can think of some 2400 Leopard 2 tanks sitting in stockpile in Europe. Britain has 224 Challenger Tanks in stock and AMERICA has 4,400 Abrams tanks. France has about 406 Leclerc tanks in stock.
So that's about 8000 reasons to think carefully right now without even taking into consideration what could be produced if needed.
Poland currently has 247 LEOPARD TANKS but has also gotten 10 K2 Black Panthers from SOUTH Korean WITH ANOTHER 180 on order.
These Black Panthers are state of the art built from the ground up by the Koreans and on par with the Leopard Tank except for price.
https://www.youtube.com/watch?v=Wi4k7b9VsTE
If the tanks dont make Putin worried and at the negotiation table fast, when the F16 start arriving they might do the trick.