Zardnaar
Legend
What I'd say is, it was part of the completely BS pop-history hodgepodge that people mistakenly think is "Medieval".
It has ladies in 12th century fashion living in 9th century castles swooning over 15th century plate-armored knights while lords practicing 16th century political philosophy fight wars using 7th century military tactics to fight over resources that wouldn't be known to be actually valuable until the 19th century (like platinum) using communications and travel ability that rivals 20th century infrastructure.
It's literally not possible to pin the entire thing down to a singular period of human history because it is actively taste-testing just about every century that came after the fall of Rome (which, whatever your beliefs about it, "Rome" as a Europe-spanning empire was gone by the 6th century.) But this hodgepodge, as ridiculous as it is, is what a lot of people think when they imagine "Medieval Europe": something that somehow combines the Wars of the Roses, plate armor, rapiers, Charlemagne, courtly love, and knights errant all into one big blob, no matter how hilariously wrong that is in terms of the actual history of Europe.
But what this means is, D&D has always been a highly selective take on what is "medieval" and what isn't. Every edition has chosen that take differently in one way or another. To claim a betrayal of that spirit only now, when the seed was planted literally before D&D was even a twinkle in Arneson-and-Gygax's eyes, is either disingenuous, or a demonstration of self-deception.
Not to many people get hung up on medieval vs gritty.
OD&D/1E had that dark ages/sword and Sorcery vibe. 2E eliminated that along with half orc/assassins and Monks.
Medival/1E purists are few and far between now. Its shadowdark and clones of B/X and OD&D now vs 20 years ago.
2E has also had its reputation improve and good condition boxed sets are pricey now.
No one cares about 3.0 either books start at $5 retail now.