NOOB question - Developer Mode - Turning Off

Site URL: https://www.alphashaving.com

So for some stupid reason I turned on developer mode. What are the consequences of turning it off?

8 minutes ago, alphashaving said:

Site URL: https://www.alphashaving.com

So for some stupid reason I turned on developer mode. What are the consequences of turning it off?

it will remove all the changes you made with your template

When you disable developer mode, you'll lose: All content in block fields, like sidebars, headers, and footers. Changes to the template, including custom collections, new or modified layouts and regions, new or modified scripts and styles, and uploaded assets and custom types

Squarespace Developer Platform FAQ – Squarespace Help

Ugh, I just did the same thing. Is there any way around this? What should I do, just leave Developer Mode on? I really don't want to redo all of the site's formatting. 

I turned on developer mode without really realizing what I was getting myself into. I was trying to add some custom code into the header, but it wasn't working, and I thought maybe it needed to be enabled. Stupid! 

I've read everything and it sounds like if I turn Developer Mode off, it will revert back to the system defaults for my template. Is there any way around this? Should I just leave Developer Mode on?