The site did its job once. It's aging now.
Your business is established. The work is good, the reputation is earned, and the website has been up for years. It probably even brought you business once. But it's showing its age: pages load slowly, the design looks like the year it was built, things break after updates, and nobody on your team is confident touching it. The person who built it moved on long ago.
Here's the quiet cost: your customers check the website before they call. Every referral you earn gets filtered through a site that no longer reflects the quality of the actual business.
A strong reputation deserves a website that confirms it rather than contradicts it.