Upsizing capacitance doesn’t always bring about improvements, and can create other problems if taking things too far. When replacing aging caps, especially main power supply caps, uprated voltage is fine, and sometimes, the temperature ratings, as there are situations where that spec. may be close to operating temps. Increasing the temp. ratings can give a bit longer life. Sometimes it is more difficult to just find a replacement cap that even fits the space requirement with same or better specs.
I am sure there will be many other suggestions given in due course.