I think the renaissance has happened. We should drop the R.
I think movements are easier to identify “post mortem”, so to speak. The OSR is getting easier to talk about as time goes on, but nobody really know what we’re in now...a post-OSR? Do It Yourself (DIY)? Old school vs new school? Free for all?
If the intro to the Renaissance on Wikipedia reads thusly
The Renaissance (UK: /rɪˈneɪsəns/, US: /rɛnəˈsɑːns/) is a period in European history, covering the span between the 14th and 17th centuries. It is an extension of the Middle Ages, and is bridged by the Age of Enlightenment to modern history. It grew in fragments, with the very first traces found seemingly in Italy, coming to cover much of Europe, for some scholars marking the beginning of the modern age.
Then I'd say an OSR intro would read something like this
The Old School Renaissance is a period of tabletop gaming history, covering the years between 2000 and 2015. It is a reaction to brands producing newer version of …
Role playing games (especially these days) tout 3 main ideas: Social encounters, exploration, and combat. Large sections of game books are devoted to combat rules, and what makes combat in this game better and/or easier. Key locations are fleshed out for player characters to explore: dungeons, towns, and wilderness. That leaves the final idea, the one I hear the most people complain about: social rules and a frequent lack thereof.
The reason there aren't as many social rules for D&D (an other similar RPGs) is that most players just ignore the rules in favor of their own social skills. Your character has a Charisma, Fellowship, or Leadership score? Who cares?! Players just sit down and act however they want instead of playing to their characters social abilities and social skills. They play as smart as they want to be, as wise as they want to be, and as smooth tongued as they want to be.