I was always told that regardless of what your ink or vinyl is that you're using.... laminate will only add possibly 12 months of life up to maybe 24 months.
Again, it all depends on your conditions. Are you near the equator, far up north, using eco solv inks, true solvent or U/V ??
In fact, you can print a print today with a batch of inks on a wrap , a sign or whatever and use the same ink for a print tomorrow and you could have as much as two years difference.... simply based upon the colors going on it.
Okay, let's say you have a guy in Florida, doing a digital print with laminate, with a lot of pinks, reds and other pastallish colors, while the next day he does a full rasterized printed picture with all kinds of darker colors using lotsa greens, black and some other dark colors.... the second one will probably last longer. Now use the same machine, inks, colors and some guy in Connecticut does it.... he might get two or three more years.... simply based on location.
These companies have to take every detail into consideration when they are selling to people around the world. They can't have certain warranties for you and different ones for someone else. Suppose someone sells their units second hand to someone far away ?? There has to be an industry standard and we all have to use our noggin a little on this stuff. Now take that whole scenario and use the best grade vinyl.... everything will step up a few notches, so why not just use the best you can >>
In most cases, a job is only gonna be a few dollars different in the end for each job, except wraps... a little more involved on these. Anyway, if you price out the price you pay for stuff, what you charge your customer, who is incidentally paying for it completely..... why complain about saving a few dollars, when they paid for it and you're only complaining because you buy in bulk ??
You buy a 54" x 150 yards roll for $XX amount and make $XX amount from it.
Now you buy 54 x 150 yards of cheaper stuff and you save some dollars, but when you break it down to possibly 18 4' x 8's, you are only saving about $11 or $12 a sign. Now, is that really something to complain about ?? I don't think so.