It really depends on the individual circumstances. Some people believe in the saying 'good horses do not return to eat the grass they have passed,' and prefer to move forward and explore new opportunities. Others believe that 'good grass does not fear turning back to eat,' and are open to returning to a previous company if the opportunity aligns with their career goals. Ultimately, the decision to consider a former employer's invitation to return would depend on factors such as the reasons for leaving the company initially, the current career path and goals, the relationship with former colleagues and superiors, and the potential opportunities and challenges that come with returning.