Running discussion on SP, page-8425

Mr Molas has his finger on the pulse - worth a read if you have time -
published in 2021 so not encompassing the 21-24

https://www.mdpi.com/2076-3417/11/23/11254

'Panasonic proposed the first commercially available implementation of RRAM. They offered a microcontroller for portable healthcare, security equipment, or sensor processing applications. Renesas also investigated RRAM for low-power microcontroller units (MCUs) for IoT applications [52]. Intel [47,55] and TSMC [56] both demonstrated RRAM based macros in 22 nm in a 1T1R configuration for embedded applications, with comparable features (85 °C 10-year retention, 10 kcycles endurance).
Intel studies mobile and RF applications and TSMC targets eFlash, IoT, and smartcards.
Adesto offers RRAM based EEPROM, as a compatible serial memory for discrete and embedded memory applications. They target IoT and other energy-conscious applications. The startup Crossbar is also very active and provides RRAM for IoT system-on-chips but also persistent memory solutions.'

Micron presented a 16 Gb RRAM in a 27 nm node targeting SCM applications with excellent reliability, achieving 105 cycles with <7 × 10−5 of bit error rate due to optimized programming schemes
No further work has reported from Micron but SONY also provides cross-point RRAM for storage class memory applications with an excellent widow margin of two decades at 3δ [69].
Western Digital introduced RRAM in its roadmap [70] and announced “RRAM SCM will close the gap in terms of per-GB cost with BiCS NAND and will thus widen the gap with DRAM, which will make it more economically feasible”. RRAM also has the potential to enable analog neuromorphic computing features.