Why there is so many update?

Updates are what keep your iPhone running smoothly and make it the revolutionary product it is today. Updates provide the latest features, security patches, bug fixes, and performance enhancements.

You may also consider that your old iPhone 6 and 8 Plus stopped receiving updates a while ago, and that your new iPhone 14 Pro is still supported with updates, and thus you will receive them frequently on it.

It also isn’t much of a burden at all to update your iPhone, and if u have Automatic Updates turned on your iPhone, it will update on it’s own when your iPhone is charging and on Wi-Fi, usually when not in use.

I don't have such issue when using iPhone 6 and iPhone 8 Plus

That is because Apple is no longer supporting updates for the iPhone 6 and iPhone 8 Plus.

But, you might be interested to learn that the iPhone 6 had a total of 78 iOS updates from the time that it was introduced to the time that updates were discontinued. There has not been an update for the iPhone 6 since January of 2023, so of course you have not seen a new update in over 2 years. You can't compare that to a current iOS version, which might have important security updates every other month or even more often.

If you don't want to keep your iPhone 14 Pro up to date security wise, no one is forcing you to update.

If you are interested, we'll check on how many updates have been available for the iPhone 8 Plus, but I imagine that the numbers are similar to the iPhone 6. Let us know if you would like that information.

I guess Apple patches vulnerabilities as they come up. We don’t really know why there may be more or less updates than what you’re used to. We’re simply your fellow users, not Apple Support.

Bob Timmons wrote:

If you don't want to keep your iPhone 14 Pro up to date security wise, no one is forcing you to update.

No one except his company’s policy 😆