Remember, collapse rarely looks imminent. Everything appears pretty normal until it's all of a sudden not normal anymore.
Another sign for those who look for such things:
Discover insights into the decline of Russian tank restoration rates, dropping significantly compared to previous years.
militarnyi.com
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The article goes into more detail, but the TLDR is that all of the relatively to moderately easy stuff to repair from their stockpiles are gone and the refurbs are taking longer and longer to get ready for the field. Current restoration levels appear to be about 50% of what would be necessary to maintain the current rate of losses.