I absolutely cannot understand why people think or communicate that mcxnow felt scammy.

I can only remember one unplanned maintance downtime for which was stated after an analysis that it has been caused by a memory fragmentation issue which triggered the ai to take the site automatically down before trades could be made.

Once there has been a planned downtime with a date set from which on the coins will not be accessable until the site is up again. I left most of my coins in the exchange and after the site was up again all my coins were still there.

One thing which people who do not understand what they trade may refer as "scam" to is the fact that the doge developers decided to switch to a new hardfork without making sure that the backend infastructure the community has built upon their coin is ready for the switch. As those traders realized what they traded and wanted to switch to the hardfork it was not possible since the users created a own ecosystem in the original doge chain which has been independant to the new hardfork (yes, people mined in that chain to trade coins on mcxnow).
Like no other exchange does mcxnow always showed the current blockchain height of the hot wallets live and everybody could see wether the site is in sync or not.

If the codebase is as stable as it was the new site will really become important for the whole crypto scene since there is absolutely nothing comparable for high frequency trades and trade execution time. I cannot remember any successful ddos attack since the main exchange is hidden behind proxies.