This is fine if your work is at a small company of some sort, but your personal data is at risk of be combed through if the company is ever subpoenaed or forced

This is fine if your work is at a small company of some sort, but your personal data is at risk of be combed through if the company is ever subpoenaed or forced to participate in discovery and the discovery gets to "direct access". Even if not compelled by a court, when your company gets big enough, they may request you hand over said laptop for their own internal investigations over things like NDA compliance or workplace misconduct. It could also come back to you in terms of IP ownership of personal code - using company-provided hardware can be a big factor for cases where the company claims that some amount of work you did was work-for-hire and thus owned by them.