WOW, but there is a lot of trolling and misinformation in this thread.........
I knew you guys were in here, but am still amazed sometimes..........
At least the OP's question was in good faith.
I think several of you should shave with a razor from Dovo or TI that has no spine wear and really enjoy yourselves. FYI, these do not exist. I also think you should look at the spines on new TI's and realize that experienced people sharpening razors couldn't put that much wear on a razor in a few years of honing it. Out of the thousands of razors I hone every year, I get less than a handful of people requesting tape and once again, I am betting that if you measure the small amount of metal removed from a razor in good condition including bevel setting, you would find it far less than anything needing a precaution. Once a razor is honed properly and not damaged or dulled by improper use, the maintenance of it requires virtually no addition wear.
This topic has been so beat to death here.......
Have fun.