theoretical limit in data storage (in general) or just theoretical limit of current technology used on HDD? Even if you're talking specifically about HDD, theoretically we can see at least 80TB capacity[1].
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well, set aside the pride and all. if you are not a developer, there's no reason for you to download such heavy data. am using electrum right now for my btc holdings. light and txs are fast as well.
I'll have to remind privacy concern is also valid reason to run full node. For example, you don't want random electrum server know list of address belong to same person.
[1]
https://www.pcmag.com/news/next-gen-hamr-platters-promise-80tb-hard-drivesits also not relying on once sourse supply of balance
imagine if a litewallet didnt tell you a payment arrived at your address. reliance on a litewallet means you only know what they choose to tell you.
they can send you a tx, say its confirmed. but the utxo does not taint/track back to any coin mined not coin existing on a blockchain. should they go down a deceitful route
running a full node means you get to see it all and know all coins have a track/taint back to their origins of creation(coinbase reward) that validates that all coins are real coins and not ghost coins made up
yes not everyone needs to know everything. but if your receiving regular payment from alot of random people.. just seeing a tx designated for you is not enough, you will want to sure it is confirmed and has valid funding becasue trusting it
becasue the more payments you receive the more risk of abuse if you did operate without a non independent checking method