ILR Restriction after having previously been granted

For info
Should anyone who has ILR status leave the UK for more than 2 years, then an application to return is necessary.

So indefinite is not really true for some future scenarios that cause leaving the UK for more than 2 years

https://www.gov.uk/returning-resident-visa

Its indefinite leave to remain, not to go away. The conditions are listed when you apply.

i wonder if its the same if someone has acquired citizenship ?

The person would be covered under the same rules as you or I.( would of thought as they are now a British citizen)

A good thing too.

I've posted the topic as visa applicants may think that once ILR attained then settlement is completed, but circumstances causing to be outside the UK for a period of time doesn't mean the end of immigration process.

Seems attaining UK Citizenship would overcome this issue and offer more freedom?

There is a 15 year limit on British citizens for some rights I think.