I have been thinking about this the past few days—Google has already issued more shares, so do other big tech companies have to follow suit? The wealthiest ones have increased their share count; do others have any other options?

Answer: They will continue to issue shares! Therefore, the days of big tech stocks making a fortune by buying are over!
An increase in market value, besides price appreciation, can also be achieved without price changes; the same market cap of 10 trillion yuan can be reached simply through share issuance.
The AI arms race has just begun.
Massive capital expenditure has just begun.
The MAG7 list is just beginning to change.
This judgment will be validated in a year.