@benoit If the Flectra Docker image is based off the official Odoo one, that would be helpful, as the Docker image deploys an Odoo to deploy other Odoos (i.e. additional Odoo instances).
The Flectra demo is very snappy and looks quite pretty.
Odoo was starting to support proprietary stuff to the detriment of the Free Software. For example, the calendar functionality was setup to work with proprietary systems like Google Calendar and Outlook, but there was no Free standard available by default.
Flectra could take the lead over Odoo in some ways if they tried some more experimental features, like support for crypto-currency (Bitcoin, Ethereum, Monero...) in the e-commerce application.