Think of it as farming, if you sow a lot of seeds some will never come up, some will come up, wither and die and some will come up and grow to great height, then whither and die.

Everything has a lifecycle, businesses do too.

Any business that has generated money over its lifespan and has employed people and paid them is by some measure a successful business.

The timescale at which that cycle plays and the size of the business are not relevant.