Installing multiple plug-ins that either require a specific date format or have none set by default. Its wild to me that given how important date format is to get really good value out of obsidian and its delightful collection of plugins that there isn’t a vault level setting for date format that all plugins could inherit from.
A core feature that ideally helps new obsidian users choose a date format for their vault. This date would be recommended to plugin authors to use. Obsidian could flag plugins a user has on that uses a different format to help with visibility.
Bonus: A additional button would trigger a reformating of the users vault’s contents to update the old format to the new format in each file.