Congratulations and good health to your grandmother!
Here in Airstrip One it’s almost impossible to get filter coffee at cafes. Most places only serve an Americano, which I find acidic, bitter and flat tasting. Hence I usually have English Breakfast tea.
At home I rely on Aldi or Lidl’s best, which are not as good as coffees costing twice as much but you soon lose the difference in taste. I’ve recently turned back to the pour-over method of brewing. It’s very convenient when you just want one large cup.