Way back in October 2013, when the first ACA Open Enrollment Period (OEP) launched, there were infamously massive technical problems with the federal exchange (HealthCare.Gov) as well as some of the state-based exchanges (such as those in Massachusetts, Maryland, Oregon, Nevada and Hawaii).
Over the next few years, some of those exchange websites were replaced with brand-new ones (MA & MD). Some of the states scrapped theirs altogether and moved onto the mothership at HC.gov (OR, HI & NV, although Nevada has since split back off onto their own exchange again, and seems to have gotten it right this time).
Last week I noted that Pennsylvania is joining Nevada, New Mexico, New Jersey and (apparently) Oregon in moving away from the federal ACA exchange mothership known as HealthCare.Gov:
Pennsylvania moves to take over health insurance exchange
Pennsylvania is moving to take over the online health insurance exchange that’s been operated by the federal government since 2014, saying it can cut health insurance costs for the hundreds of thousands who buy the individual Affordable Care Act policies.
...The bill is backed by Gov. Tom Wolf, a Democrat, and his administration says it would make two important changes to reduce premiums for the 400,000 people who purchase health insurance through the Healthcare.gov online marketplace.