I am confidently considering purchasing a professional WordPress theme to replace my current free option. However, I am mindful of the fact that WordPress source code frequently undergoes updates for security and bug fixes. This raises concerns about premium themes developed by individuals or small teams that may cease functioning without warning. If such an event occurs while I am utilizing their theme, it could potentially impede further website development due to its inability to update. Is this truly a significant concern? If so, what viable solutions exist to mitigate this potential risk?