Don't use sand charts kids.
And what would you use as an alternative? It would take a LOT of bars to display this information during the 90s as a grouped bar chart.
Non-cumulative line charts. As usually is the answer to that question.
As a bonus, you can break line charts by line, and you can zoom parts of it.
I suppose. But a chart with 23 different lines is quite difficult to read in my experience.
I.e., visually distinguishing that many lines from each other is not easy.
What does not make sense is slanted lines; they draw different, slanted shapes that don't convey information.
Instead, a stacked bar chart would be appropriate.
It's also hard to offer so many distinct saturated colors, and color + pattern does not work all that well for small slivers like IBM 3090. A palette of appropriately contrasting colors (different hues, intensities, and saturations) would work better.
The real mistake is that the most rapidly-changing values should have been in the middle, with the slowly-changing values at both top and bottom. This would help align the values from one sample to the next, making them easier to follow across the chart.