It is potentially unsecure both as a process and with its consequences, but if you know what you are doing (carefully read tutorials and guides step by step especially if you have no beforehand experience) you have a very low chance to brick your device or corrupt it in any other way.

It’s important to note that rooting is different from device model to device model and especially from manufacturer to manufacturer. Some manufacturers totally prevent rooting. Officially you lose the warranty of your device if you root it.

Some of the other commenters have mentioned that some apps check for root and refuse to work if the device is rooted (or only because the bootloader is unlocked) which is true, however if you are rooted there is variety of tools to prevent these apps from recognizing a rooted device (or just unlocked bootloader) so I wouldn’t count this as that much of a problem. I am using banking apps and google pay on my rooted phone just fine.

There are already several opinions about rooting, so I’m not entering that discussion, but I can share my view of ACC and AccA.

I’m the kind of person, who charges the phone over the night. My device theoretically supports 33W charging (can’t test this as I don’t have the stock charger), but when charging over the course of several hours I don’t need this speed.

I have the current limit set to 750mA and max charge in range of 90-95%. This works fine for me and in case I need a quick top-up there’s always Charge once to #%, without restrictions option.

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Yes it degrades security, yes it is worth it for my usecase at least