Well, they cannot continue the way it is now. They are gradually losing occupied territory and 100s of their soldiers die every day which surely should make them quite desperate. They still have a few cards left at play to escalate things and I think they are throwing them now. The change in tune from some of the most prominent propagandists has been quite obvious the last few days/weeks, they are quite openly talking of being in a war against NATO. So either they have already entered a phase of "there is no shame in failing to achieve some of the objectives because we fought the entire NATO block and since we are the good guys here, we don't want to escalate things further and will settle for the regions we already control since the fair referendums resulted in them wanting to join Russia", or they are about to escalate things a lot more. I guess we will find out pretty soon.