The post discusses the proposal for a linear collider facility at CERN, highlighting advancements in 'cold copper' accelerator technology that enhances the design of particle accelerator cavities using modern computational modeling and CNC fabrication. This could enable more efficient particle accelerators. However, it also touches on the lack of progress on the International Linear Collider (ILC) in Japan due to financial and political challenges, compounded by public misunderstanding of the project's benefits. The need for such large-scale investments is questioned as Japan faces demographic issues that impact its fiscal capacity. The post concludes with a mention of the potential for smaller particle accelerators, suggesting there might be emerging technologies in this area.