WWW: For myself, i don't think that easy and GO are less safe but the problem with ANY new company is that it does not yet have 'corporate memory'.
An organisation - commercial - or a govt dept - is vulnerable to mistakes, whilst it builds up experience. It does not matter if the majority of employees in the new company are all experienced in the field (airline/govt) because, until they have worked together and made mistakes together, they will not build up a corporate memory. Each organisation functions in its own way and experience can be transferred but will have to be fitted into the new company.
This means someone saying, "Hang on - last time we did this it all stopped working the next day. What he have to do is ..."
That does not mean that low cost airlines are more likely to major failures and hull loss but, I suggest, start-up companies are more likely to have that kind of problem. I stress again - in any field.