[falcon123]

for me it depends a bit electrolytics GENERALLY get replaced with like items UNLESS i can find a film cap that will fit of the correct voltage and value. this was the case in two hallicrafters radios. and my philco 84 has no e caps in it the can has two films in it this doesnt happen very often. micas fail too especially when they have high dc on them if that happens then its a modern c-d silver mica BUT sometimes a cog/npo mlcc can be used in their place, available lead length depending and i like muratas. for the most part people talk about the notorious bumble bees or wax/paper/foil types. its film caps for this either radial or axial . its important to try and install the replacement in the same location to avoid lead dress issues if in doubt make sure its where the old one was but its going to be smaller with any modern part you use and so lead length becomes an issue. axials while having an inductive component are by their nature longer BUT radial orange drops are a  better choice sometimes as they fit better sometimes like around tube sockets and terminal strips. its difficult to put into words but like the man said about the value of  real estate, location,location,location. my hallicrafters sx62 has nothing but orange drops that are stacked film and i listen to it every day.