My practice is NOT using Thin Lines if you want to see if something will look good on View/Sheet. Since the use of 3rd party software for bulk PDF/DWG/... "Print Preview" has been out of use for several years. This goes for our entire firm, the actual result, e.g. PDF is the only result that count. The time we generate a PDF vs a Print Preview, gives us the benefit, if the result is good you already have the end product.
Second, if you have a graphics card which is "a bit on the low side", Print Preview will not show as you want it, whereas the generated PDF will mostly be the result you want. In this case Zoom Window will not have any benefit at all.
The only use of Print Preview which is left to use is a "quick 'n dirty" printout of a partial View, since the not using Thin Lines gives me a very good idea what to expect on the printout.