Life expectancy is always an interesting question. It depends so much on how well someone sets up their tent and keeps it tight and how many severe storms it goes through.
If you only use the tent a few months a year, you might have trouble ever wearing it out. We have left our lightest 14oz tent up 4 years, almost 1500 days and the vinyl was still intact and the tent construction was like new. We left our 18 oz premium tent up for over 12 years (4400 days plus) with same results. They were both closing in on the end of their life, but still no holes in top and construction was like new. We build the strongest, most reliable and longest lived pole tent in America. Check out https://www.gospeltent.com/description/
to see a detailed description of our tents down to the thread.