Unless the delamination is large and such that the 60 mph wind from driving can get underneath the siding and rip it off, it shouldn't be a problem. My 2002 has several spots where there's delamination (the largest is a little over one square foot). They were there when I bought it in 2017 and haven't changed since then. They are less apparent in colder weather which makes sense.
Most are near an edge of a panel so, someday, when I've taken care of everything else, I'm going to try to fix them. You can find DIY videos on Youtube and postings on Winnieowners, IRV2, etc. on how to fix them.
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Bob C
2002 Itasca Suncruiser 35U
Workhorse Chassis
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