Quote Originally Posted by Tiktakkat View Post
As for time, many campaigns wind up having less downtime than your average scribing wizard might like. This is reflected in most published adventures covering two levels, often with little real opportunity for downtime at the level gain point. While other classes can put off equipment changes during that time, wizard's get hit very directly being unable to add anything but their automatic spells. Adding more time to that will have a very significant impact.
I think the 'assumed' playstyle is that you might be running around very hurriedly during an adventure, but afterwards you'll spend quite a while resting- so you gain two levels during the adventure, and then spend two months crafting some new gear, updating your spellbook, and writing down some scrolls (admittedly this is largely for the benefit of your spellcasters; other classes don't need anywhere near that much downtime and usually don't get much mechanical benefit for having it.)