USB-C is reversible. Durability varies depending on who you ask (ie personal experience) and what you read. If you read the literature for each connector, both claim to be capable of performing thousands of insertions/removals. Whether you believe that is another question...
Is it a downgrade? In my opinion, absolutely not, but acknowledge you/others may disagree.
For me, the ability to use one cable to power devices (ie laptop, monitors), charge devices (iPhone, iPad, macbook, laptop, andriod phone, android tablet), charger at a much higher rate (up to 100w for USB-C with the appropriate charger), transfer data at a higher speed (USB-C can be used as a replacement for HDMI/Display port/VGA) makes it (for my use) a superior connector. Again, this may not be the case for others...