Thank you for the comment, there is limited space for a blog so a number of your points will be addressed in part 2 which looks at how and where we mount the devices and what the driving requirements are.
Most capacitor types are available as either SMT or TH. Oftentimes ceramic caps are used int SMT as decoupling due to low cost and low ESR. As others have noted, temperature and voltage operating conditions need to be accounted for.
(Aluminum) electrolytics are commonly available, as are tantalum. The Al electrolytics tend to be relatively large depending on voltage and capacitance. This can lead to mechanical shock and vibration problems, as the only thing holding them on the board is the glue between the pads and the PCB material.