Paper charts are still acceptable for now. They will become problematic when the the NGA stops publishing chart corrections. BA had planned to totally withdraw paper charts next year, but has pushed it back after strong pushback from users.
The other thing to remember, is that ARCS charts are not acceptable as the primary mean of navigation. If you go paperless, whether inland or offshore, you can only use ENC’s.
The good news, as most of you know, is that all U.S. ENC’s and updates are available free of charge online.