If you're worried about tantalum capacitors failing, there are multilayer ceramic capacitors that will work, they're about 2x the cost but they are extremely reliable. They use this stuff in military equipment and satellites, just how reliable do you need it to be?
Either way it's splitting hairs. Someone who is reasonably experienced soldering with a temperature controlled iron can replace SMT caps easily with very little risk of damage to the PCB. I would not be worried about future replacements, modern good quality parts will last decades easily. If you are going to worry about 40, 50, 80, etc years into the future there are bigger issues. You're likely to find that plastic parts like the case of the machine will crumble to dust and certainly things like CRTs will get hard to come by. There is already virtually nobody manufacturing or rebuilding CRTs of any sort.
Either way it's splitting hairs. Someone who is reasonably experienced soldering with a temperature controlled iron can replace SMT caps easily with very little risk of damage to the PCB. I would not be worried about future replacements, modern good quality parts will last decades easily. If you are going to worry about 40, 50, 80, etc years into the future there are bigger issues. You're likely to find that plastic parts like the case of the machine will crumble to dust and certainly things like CRTs will get hard to come by. There is already virtually nobody manufacturing or rebuilding CRTs of any sort.