Addendum: food
security was assured, food
choice was very restricted by modern standards. Remember the medieval period is pre-Colombian exchange, so no potatoes, no tomatoes, no peppers. Some spices, but a different range to what modern palates are used to. No refrigeration either, so you're limited to seasonal availability. In the winter that means you're eating a lot of root vegetables and bread, even if as king you're guaranteed a supply of fresh meat and fish (from the royal holdings dedicated to producing it).
Source: https://en.wikipedia.org/wiki/The_Forme_of_Cury
This is where you get the memes about shocking medieval Europeans with a time travelling bag of Doritos: both the bag and its contents are completely impossible items for them.
Worth noting that durable items could be shipped long distance - precious metals, gems, textiles - but foodstuff shipping was more limited to high value density stuff like spices and the European wine trade.
Speaking of wine: no modern stimulants. No coffee, no tobacco, no weed, no cocaine, no opiates. No painkillers, no anasthesia. For all those situations, you have one option: alcohol.
A huge number of critical historical decisions were taken by people who would fail a brethalyser.