I don't understand why this was downvoted, if such a proposal had been made in 2022 during first Istanbul talks, it could have prevented another three years of meatgrinder. As during those talks Russia openly discussed getting troops back to pre-2022 border as possible option, and European alliance instead of NATO (i.e. no US troops and nukes in Europe) is also offer that is hard to ignore. So after some negotiation it might become a deal; sadly noone offered that.