How to handle grid-based data in ECS

in the blog post : https://tech.innogames.com/unitys-performance-by-default-under-the-hood/

int the conclusion it said :

• It´s worth to mention that working with grid-based data is absolutely not recommended. ECS will not take care for you that neighbor cells are lying in memory next to each which lets you jump through your memory like a maniac.

but it does not tell me how to do when i want to use grid-based data...Is there another data...

How to handle grid-based data in ECS