Blockchain is a good technology when you have two specific issues;
1. Checking the authenticity of a transaction and
2. You’re not processing very many transactions.

For example,if you want to apply blockchain to property registry that would be better and that might be a good application.
You probably can’t apply it to things like election because it will be too slow if you get in rush in voting.

But actually blockchain has one major problem and it’s a problem that would be fatal to Google/Alphabet’s business model.
Though,it’s not “scalable” and scalability is the ability to add more capacity to a system by adding more resources. Blockchain is the opposite of scalable,the more resources you add to it,the slower it gets as each resources is always checking all the others for authenticity,which will doubling your hardware cuts processing ability by 50%.

Google Drive works because if you need more users,you just add more servers. You can put them anywhere and any resources you add makes it work better.

Bitcoin is the best known example of a blockchain,it gets slower when new miners are added.
At present,Bitcoin is limited to seven transactions a second but by comparison,i think VISA has a peak transacting speed of 500,000 transactions a second. So it’s not based on blockchain.