Comment by cauch

What are your source to say so?

Let's take for example https://arxiv.org/pdf/1901.02789

It's not even clear where String Theory is categorized in this article. Maybe High Energy Physics? Maybe Condensed Matter? It already shows how broad it is, as they already consider that people with such a different specific subject (for example theoretical dark matter in HEP or superconductivity in Condensed Matter) are not even "changing field" when they move to String Theory.

In this article, you can see on Figure 1 that about 65% of physicists (similar in HEP and CondMatter) are also working on subjects that are in one other category (so, it's not even that the person is doing String Theory and another subject inside their own group, like dark matter or superconductivity, it is more like String Theory and Astrophysics).

In Figure 2, you can see that 38% (resp. 21%) that have started their career as specialist in HEP (resp. CondMatter) ended up changing specialisation within about 5 years. (and this is "voluntary", it means that "changing specialisation" is in reality pretty easy, as of course the majority of people could change easily but just decide not to because they don't see the point of changing)

Even without this study, you can easily check the reality yourself. If I do a search on "computational tools for string theory", the first result I get is https://compstring.org/.

First, if you look at the list of participants, you will notice their CVs and how diverse they are, with background or even current activities in: SUSY, QFT, CFT, condensed matter, cosmology, quantum gravity, black hole thermodynamics, ...

Second, if you look at the software, you will see the majority are very recent (2025, 2023 and 2025). Each of them require learning the specific framework, with new rules, new ways of describing the problem and new ways of making the software do what you want. This is similar to passing from ReactJS to Angular (both are about 10 years old, so in fact, the String Theory community seems to change framework more often than devs).

You can also look up in wikipedia, the famous names in String Theory, they all have plenty of activities that go well beyond string theory (which means the reality is even stronger, as they were not even forced to do something else, they've done it because it was trivial for them to also work on these subjects): Maldacena and Susskind on black holes and wormholes, Shenker on quantum chaos, Seibert on SUSY, Strominger on gravitational waves, Fischler on blackholes production in particle colliders, Kounnas on GUTs, ...

> A string theorist who decides to pivot away from string theory essentially has to start their career over from scratch. It’s not even close!

That's just factually not true. And I've provided data that demonstrate that. It looks like you have no idea what a string theorist is doing and how they can transition to another field.