You can get by for years with two shave ready razors, a good quality linen/leather strop and a high grit barbers hone.... oh yeah and the talent to use them correctly.....
For many of us this is more than just shaving each morning, it ia a hobby that we enjoy, so we tend to try and take it to a different level....
I did exactly that for years, 2 razors, 1 barber hone, 1 good strop. Since Ive gotten into honing, its a whole new game!