5 years on a marriage ARC, do I have to wait 10 to get my APRC?

Dear OP,
Could you post the link to that 10 year issue? I do not think it is correct. The only recent change was a rise in the minimum wage.

The APRC procedures are actually easier than what they seem. Consult this thread: APRC Application Procedures (Official Checklist)

And follow the instructions from NIA to the T. It is quite straightforward. As long as taxes have been filed and there is no break in the ARC, you should be fine.