Crawford Temple tells Recruiter magazine that Umbrellas existed long before Off-Payroll and while many contractors will return to operating through their own limited companies many will still continue to use umbrellas as it suits their requirements:

https://www.recruiter.co.uk/news/2022/09/mini-budget-recruiters-give-nitty-gritty-changes-ir35-and-msc-legislation?utm_source=Adestra&utm_medium=email&utm_term=