The Past, Present and Future of Programming Languages - Kevlin Henney - NDC TechTown 2025

Value of the Information & Strength of the Argument

The talk provides valuable insights into the dynamics of programming language popularity and evolution. Henney’s argumentation is solid, grounded in data from multiple indices (TIOBE, RedMonk, IEEE Spectrum) and historical examples. He critically evaluates the biases of each data source, which strengthens his credibility. He effectively uses the ‘incumbent effect’ and the concept of ‘styles vs. paradigms’ to explain the slow pace of language change. His discussion of the impact of AI on Stack Overflow and programming practices is nuanced, acknowledging both the decline and the role of LLMs. The talk is well-structured, moving from past to present to future, and he supports his points with concrete examples and quotes. However, some parts are anecdotal and based on personal experience, which may limit generalizability.

Scientific Rigor, Source Quality, Title Accuracy

Henney demonstrates scientific rigor by referencing specific data sources (TIOBE, RedMonk, IEEE Spectrum) and historical figures (John Backus, Robert Floyd). He acknowledges the limitations and biases of these sources, which is commendable. The title accurately reflects the content, and the talk stays on topic. The sources cited in the description are conference links, not direct references to the data, but Henney mentions the sources verbally. The talk is well-researched and balanced, though it is an opinion piece rather than a systematic review. The title is appropriate and not misleading.

The title accurately reflects the content, which surveys the historical evolution, current state, and future projections of programming languages.

8/10

The speaker is a well-known software consultant and author with deep expertise in programming languages. The talk is based on personal experience, historical knowledge, and analysis of industry data (TIOBE, RedMonk, IEEE Spectrum). While it is an opinion piece, it is well-informed and balanced, acknowledging biases in the data sources.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 02:00Introduction and humorous opening about the talk's title.
• 05:00Reference to Anthony Doerr's book 'Cloud Cuckoo Land' and its prediction of programming languages.
• 10:00Discussion of John Backus and the 1977 Turing Award speech on functional programming.
• 15:00Analysis of TIOBE index and the stability of top languages since 2020.
• 20:00Comparison of TIOBE and RedMonk rankings, highlighting biases.
• 25:00Discussion of Stack Overflow decline and the impact of AI.
• 30:00Historical overview of language generations and the 'millennial bump'.
• 35:00Exploration of Algol 68 and its influence on modern languages.
• 40:00Discussion of the slow adoption of new features like C++ modules.
• 50:00Projections for the future, including the role of AI and LLMs.

• NDC Conferences — Conference organizer and host of the talk.
• NDC TechTown — Specific conference where the talk was recorded.

• TIOBE Index — Shows the stability of top languages over time.
• RedMonk Programming Language Rankings — Provides a different perspective on language popularity.

• IEEE Spectrum Top Programming Languages — While generally concordant, IEEE Spectrum's ranking includes some languages not in TIOBE or RedMonk, indicating methodological differences.

• ndctechtown.com