Yes, we were streaming for 24h about Liferay DXP and Liferay Portal 7.3 (and previous versions). All kinds of technical information that might be of interest for you. You might have missed it, but luckily we have it all recorded - and the recordings are available for you:
In our journey to 7.3 we have reworked many of the applications and pages of our site to use more out of box and new features, one of which is fragments. I will be sharing some of our process, implementation, challenges, and benefits of moving to fragments.