The same thing happened when the 1.2x firmware was introduced. History is repeating itself over again. To me this is nothing new.
Having a new config file definition might be an inconvenience for some, but the vast majority of people who buy a router have no idea what firmware is or that it can be upgraded. So, for the few who do this sort of thing, it's not a huge issue.
As with most things in life, if you take the time to read the manual, jot down your settings, and plan for the worst, when things go wrong you won't kick yourself for losing everything and having no backup.