The alphabet is better than planets because you can always throw in more Unicode letters, while those damn astronomers took away a perfectly good planet!
It's hard for a company like Sun to have a collection, a variety, a spectrum of companies, when busy-body astronomers feel compelled to reclassify your favorite planet as a "dwarf" out from under you.
But Alphabet has a long way to go beyond the 26 English letters, before they run out of funny diacritical Unicode letters with umlauts, accents, slashes, ligatures and dingbats.
Right, that's what I was saying. The point is obviously not to collect one company for each letter. When they have 5 companies that start with G, are you really going to look at them and say "LOL I TOLD YOU SO"? The name just means variety, not a specific naming plan.