The DOS website that hosts the DS-160 form was down a few days ago on Friday. Hopefully the site is back up as nonimmigrants need to access it to apply for this visas.
USCIS announced they are in post-development of their transformation system. It's a new system that will allow applicants to apply for benefits online moving the agency away from a paper-based system. The first form to be rolled out is the I-539. Given the complexity of the application process, it'll take some time for the USCIS to get this transition down. We'll keep an eye on the progress.