In-game mail between guildmates now is instant, but in the past, it had a 1-hour delay, just like mail between strangers. The change to instant mail made things more convenient, but removed the social interaction of having to meet up with someone to make a transaction if you wanted something sooner. So we’ve reintroduced that delay for that reason. Other conveniences such as auto-completion of names or quickly clearing a mailbox have been left in. This seemed an easy enough call given that someone could create an add-on to do the very same thing, and we felt those sorts of conveniences didn’t impact the fundamental “classic” experience.
Earning gold in World of Warcraft: Classic is all about optimizing your spendings. Back in the day, your character’s skills were acquired from a trainer, using money. Don’t just buy everything he or she offers! Read the skill descriptions and be mindful about them. Quite a few characters can live through the levelling process without learning some of their utility or damage spells. These won’t go anywhere and you’ll be able to learn them later on.
This did not just simply come randomly, however. Players have been demanding and asking for World of Warcraft Classic for many years now. And Blizzard has likely learned from companies like Jagex that regained a huge portion of their player-base with the launch of Old School RuneScape, which prior to it had a 2006Scape private server. Similarly, World of Warcraft Classic/Vanilla has been around in the form of private servers for many years now and has been very popular. Even top players and streamers have been known to play on these private servers. The only issue is Blizzard were not the ones profiting from these ventures.