It’s down to whose advice you want to trust, I suppose.
The newly qualified, professional electrician that knows the 18th regs book backwards or the newly retired, been in the job 40 years, but last book was the 17/3rd.
In a forum like this, any suggestion that may not be 100% accurate is discussed afterwards
I’m not saying every retired spark just gives up and doesn’t keep their knowledge up to date. Even borrowing a current book from someone and reading it instead of playing golf 7 days a week.