Saying "Google hasnt changed" is somewhat of a disservice to what Alphabet is. Its an investment firm / publicly traded venture capital stock, and one of their main holdings is Google. Their future growth potential is much more than just Google, despite Google being their current source of revenue. I would hope, over time, Google Ads being 80% of Alphabets revenue drops and drops, and if I were investing in Alphabet that would be the reason, not to buy into Ad Words ownership.

https://www.forbes.com/sites/oliviergarret/2019/09/27/if-you...