Artefacts
To get around those difficulties, people in the fantasy world have invented magical artefacts bearing the same diagrams as they use when practising magic directly. Those artefacts can be used by anyone and either be fueld by the magic of the environment (passive artefact) or the magic of the wearer (active artefact). The downsides to them are 1) the lesser control they give over the magic, 2) their lack of adaptability, 3) the leakage of magical power that occurs while using them, and 4) the possibility of having the artefact taken away or getting taken away from it.
Still, artefacts are far more preferable for a number of applications. You'd never want to have to gather the necessary focus to use magic every time you want light in your own house, do you?
On the other hand, because magic is associated with nobility, it's become such a social symbol that it's exactly what some people do, no matter how annoying and cumbersome it is.
Same with actual nobles, with many priding themselves on their skills so much that they would do everything to avoid ever having to use a magical artefact instead, even for extremely difficult and delicate spells. If you witness any of that, you better act super impressed and avoid pointing out the complete waste of time they're imposing on everyone.
Long distance communication sounds like a useful method when infiltrating an enemy base. o,o
Too low they build who build beneath the stars - Edward Young
Indeed :D It was the way the Questing Party kept in limited contact with the king during their mission. However, as I've just added in the article, it's easy to intercept such communications and so it's best to limit them (and also the mages think they're not carrier pigeons and they're not big fan of transmitting messages like that XD). In fact, I should add that in the article too XD