Many people started a pension 10, 20 or even 30 years ago and these were normally set up through an old employer so you didn't really get much choice in the type of pension you wanted.
Billions of pounds is still held in these old pension contracts that are administered using old paper based systems with little flexibility or choice of investment. The charges on pensions are now significantly less than they used to be, however, old pension plans may still be using old charging structures and paying commission to a financial adviser who you haven't spoken to for decades.
Added to that, once you tell these pension providers that you're now resident overseas, they become puzzled about how things are going to work.
MyExpatSIPP is different. Our team have many years of experience helping expats and non-UK residents with their pension in the UK. We understand the concerns people have about the tax treatment of withdrawals in their country of residence. The modern online pension plan has simple low ongoing charges and doesn't require you to complete reams of paperwork whenever you want to change anything.