purity also gives more value if you want to sell apparel on the marketplace.
aside from that, most templates make more than one copy of an item so you can easily make more when you need to
therefore, unless purity means somethng special to you, compiling in the loading area is fast and failsafe, and saves you the cost of leveling up another ability and an inventory slot for the tool
as far as failure rates go, whether compiling, coding or decompiling, the risk of failure is always present in the matrix. you do the best you can with leveled abilties, clothes and the sig booster but it still happens. only compiling in the loading area is failsafe.