anywhere between 10 minutes to about 10,000 days depending on your conditions.
New edge, on the ice coast, if you skid turn or do alot of sideways plows while you scope out your next line or, take on steeps but arent ready and skid the whole way down,
your edge will be shot THAT run.
If you carve through firm snow, not ice - could last you a LONG time.
If you carve through ice, wont last you very long but should take you through half the season.
most people kinda live with a good bit of mediocrity when it comes to edges.
I had a pretty good system going, or I thought, whereas I would use my tuning tool with diamond stones to keep things spruced up every few times out. Well, I stopped doing it at all this year and the damn edge is just as sharp as it was this time last year and I havent touched them..
And when you go to the local shop, they basically throw it on a grinder - half of the people have NO clue what they are doing and you can land anywhere from a 90/90 to an 95/85 depending on the tech.
The more severe the bevel toward grip, the more quickly you will likely feel like you lost your edge.
So you say you cant get any fingernail shavings? What about the edges that dont touch?