Borland was losing over a hundred million in revenue while Microsoft was offering seven figure signing bonuses. There's no way they could have paid more than what MS was, since MS was using their war chest to kill the company.
If they were losing a hundred million in revenue before their best employees were poached then we should thank Microsoft for saving these people‘s careers.
I do almost nothing but develop products. However as product becomes mature I start looking for new things to do. Also maintenance of mature product requires different type of people, not inventors.