Thinking about changing jobs in my mid-40s is not easy.

‌Currently at my workplace for 12 years.
After my previous company closed down and was acquired, I moved quickly and have now been working here for 13 years.
I am the only person who has stayed since the company's early days, with the same items and customers.
My juniors have left for better companies,
and my seniors and colleagues have all moved to new departments as the company grew.
It's not that I'm exceptionally talented, but I have been selected as core personnel and have never faced disadvantages in evaluations or promotions.
However, lately, I feel like I'm trapped in a prison.
As the company grows and new investments are made,
most of my seniors, colleagues, and juniors have been offered and moved to new roles.
People around my age have become team leaders and have a certain level of discretion.
Some people my age have even been promoted to executives.
I am the only one who has never once been offered a new role.
People say management is making various comments regarding job changes, but I have never heard anything directly from them;
it's all just talk from those around me.
Rumor has it that they considered changing my role, but the client opposed it,
though I don't know if that's actually true.
The work I do accounts for nearly 80% of the company's revenue.
Yet, none of my colleagues want to take over my role.
If you do well, things just flow, but if you fail, you take all the blame.
The clients are incredibly difficult to deal with.
Since most of the company's resources are being concentrated on new fields,
I find myself in situations where I have to persuade internal staff much more than before just to get my work done.
Dealing with the clients is hard enough, but having to deal with internal staff as well is exhausting.
So, I've been going to work feeling lethargic, when coincidentally, a headhunter contacted me.
After some deliberation, I wrote my resume, and now I'm waiting for an interview after they asked to meet.
But I am still deeply conflicted. I don't know if changing jobs is the right move or not.
I thought to myself, "Let's just go for the interview since it's been a while," but I'm still worried about what to do.